Blackjack rules and table types

The UK shoe game has its own shape: six decks, specific dealer rules, and a handful of side-rule variants you need to recognise before you sit down.

Annabel Cavendish

Editor in Chief · Reviewed 14 May 2026

Annabel

0:000:00

Welcome to the lesson on blackjack rules and table types.

I'm Annabel, and before you sit down at any blackjack table in London, there are things printed on the felt and posted on the table placard that will determine how much the game costs you.

Most players walk straight past them.

This lesson is about reading them first, because those details are the game, not decoration around it.

Let's start with the physical setup, because it differs from what most people picture when they hear the word blackjack.

Walk into the Hippodrome on Leicester Square, or Aspers at Westfield Stratford, or virtually any UK licensed casino in twenty twenty-six, and the blackjack you'll find is dealt from a six-deck shoe.

You don't touch your cards.

This isn't the single-deck hand-held game you might have seen in an American film or read about in a nineteen seventies paperback.

The UK shoe game is a different proposition entirely, and the rules governing it reward attention.

The objective is the same everywhere: get closer to twenty-one than the dealer without going over, or let the dealer bust.

Aces count as one or eleven.

Tens, jacks, queens, and kings all count as ten.

Every other card counts at face value.

A two-card total of twenty-one, an ace plus any ten-value card, is a natural blackjack and pays three to two at a properly structured table.

If the dealer also holds a natural, the hand is a push and your stake is returned.

That three-to-two payout is not a small detail.

At three to two, it returns thirty-seven pounds and fifty pence.

Over a session of two hundred and fifty hands, you'll see roughly twelve naturals.

The six-to-five game has effectively charged you an extra ninety pounds compared to the three-to-two game, through payout structure alone.

The house edge difference is one point three nine percent.

The next thing to check is the dealer's soft seventeen rule.

A soft seventeen is any hand containing an ace counted as eleven that totals seventeen: ace-six, ace-three-three, and so on.

Under S17 rules, the dealer stands on all seventeens.

Under H17 rules, the dealer hits soft seventeen.

That distinction adds approximately zero point two percent to the house edge against you.

The Hippodrome's main floor is S17.

Let's cover the playing options you'll have access to at a standard UK table.

You can split any pair.

Most UK games allow you to re-split pairs, meaning if you split and receive a matching card, you can split again, up to three or four hands.

Split aces almost always receive only one additional card each and cannot be re-split.

A blackjack after splitting aces typically pays even money rather than three to two.

Double down is usually available on any two-card total, which is the player-favourable version of the rule.

Some games restrict doubling to hard totals of nine through eleven only; that restriction costs you meaningful edge.

Double after split, often called DAS, is available at most UK venues.

Late surrender is less common but worth seeking out.

Under late surrender, you can fold your hand after the dealer has checked for blackjack and recover half your stake.

It's worth roughly zero point zero seven to zero point zero eight percent when you use it correctly.

Insurance is offered when the dealer shows an ace.

It pays two to one if the dealer's hole card is a ten, and costs half your original bet.

In a six-deck game, the probability that the dealer holds a ten-value card is approximately thirty point eight percent.

The break-even probability for a two-to-one payout is thirty-three point three percent.

Insurance is a losing bet in almost all circumstances.

The one exception, which requires card counting, is the subject of a later lesson.

Bet Behind is the other option you'll encounter at busy UK casino floors.

A non-seated player can wager on a seated player's hand by placing chips in the Bet Behind circle behind any occupied seat.

Your outcome mirrors the seated player's exactly.

You win when they win, push when they push, and lose when they lose.

You have no input on the playing decision.

From a mathematical standpoint, Bet Behind on a player following correct basic strategy is roughly equivalent to playing the hand yourself.

Bet Behind on a player who hits hard fifteen against a dealer six is not.

Here is the practical checklist for any table you consider sitting at.

One: how many decks?

Six is standard in the UK.

Two: does the dealer hit or stand on soft seventeen?

Soft seventeen standing is the better rule for you.

Three: what does a natural pay?

Three to two is correct.

Four: is late surrender available?

If yes, use it correctly.

Five: can you double after split?

Its absence costs you roughly zero point one four percent.

Every variation from that baseline costs you something.

The good news is that the variation is always disclosed on the table.

Read it before you play.

Read the table.

Every time.

Don't assume a good address implies good rules.

Start with the physical game, because the rules are the container everything else lives in.

Walk into almost any UK licensed casino in 2026 and you'll find blackjack dealt from a six-deck shoe. The cards come face-up in front of you; the dealer takes one face-up and one face-down. You don't touch your cards. This is not the American single-deck hand-held game you might have encountered in a Las Vegas biography or a 1970s paperback about card counting. The UK shoe game is a different proposition, and the rules that govern it are worth reading in full before you place your first chip.

The objective is the same everywhere: get closer to 21 than the dealer without going over, or let the dealer bust. Aces count as 1 or 11. Tens, jacks, queens, and kings all count as 10. Every other card counts at face value. A two-card total of 21 (an ace plus any ten-value card) is a natural blackjack and pays 3:2 at a properly structured table. If the dealer also holds a natural, the hand is a push and your stake is returned. These are the constants. Everything else varies by venue and by game variant, and the variations matter more than most players realise.

Dealer Rules: S17, H17, and Why the Difference Is Not Trivial

The single most important rule you'll find printed on the felt, or posted on the table placard, is the dealer's standing rule on soft 17.

A soft 17 is any hand containing an ace counted as 11 that totals 17: ace-6, ace-3-3, ace-2-4, and so on. Under S17 rules, the dealer stands on all 17s, hard or soft. Under H17 rules, the dealer must hit soft 17. That distinction produces a measurable difference in house edge. the H17 effect calculates at approximately 0.20% added to the house edge on a six-deck game, all else being equal. Over a typical session of 50 hands per hour, that's a real cost.

Most UK casinos run S17 as the default, which is the more favourable dealer rule for the player. The Hippodrome on Leicester Square, for instance, runs standard six-deck S17 blackjack on its main floor. When you encounter an H17 game, you're sitting at a materially more expensive table, and your basic strategy chart changes for a handful of hands (double-down and surrender decisions on certain totals shift when the dealer is more likely to improve from soft 17).

The practical check: look at the table placard before you sit. It should say "Dealer must stand on all 17s" or "Dealer hits soft 17." If there's no placard and the floor manager can't tell you, ask the pit boss. The answer matters.

Bet Behind, BB1A, and the BB+1 Variant

UK casinos, particularly those with busy floors and limited seating, often allow non-seated players to wager on a seated player's hand. This is called Bet Behind, and it comes in two principal forms.

Bet Behind All (BB1A) is the standard version: you place a chip in the Bet Behind circle behind any occupied seat, and your outcome mirrors that player's hand exactly. You win when they win, lose when they lose, push when they push. You have no input on the playing decision; the seated player controls the hand. This is an entirely passive position, which means you're entirely dependent on whether the seated player is following basic strategy or doing something idiosyncratic with the cards.

BB+1 is an extension of the same concept that allows a supplementary wager: you place a standard Bet Behind stake and an additional Bet+1 chip in a designated circle. The BB+1 element pays at a higher rate if the seated player's hand achieves a specific outcome, most commonly an unbeaten 21 or a double-down win, giving it something of a side-bet character. The precise structure varies by venue and table software, so read the table rules before treating BB+1 as anything other than a conventional Bet Behind with a bonus element.

From a strategic standpoint, Bet Behind on a player you know to be following basic strategy is broadly equivalent to playing the hand yourself, edge-adjusted for the shoe penetration. Bet Behind on a player who hits hard 15 against a dealer 6 is not. Choose your box accordingly.

Splitting, Doubling, and Surrender: The UK Standard

The UK six-deck shoe game typically offers the following playing options, though specific venues vary:

You can split any pair, including aces. Most UK games allow re-splitting pairs (RSP), meaning if you split a pair and receive a matching card, you can split again up to a maximum of three or four hands. Split aces, however, almost always receive only one card each and cannot be re-split; this is a standard restriction and reduces the value of splitting aces slightly compared to the theoretical maximum. A blackjack after splitting aces usually pays even money rather than 3:2, again a modest reduction to your return.

Double down is usually available on any two-card total, which is the player-favourable rule (some games restrict doubling to hard 9-11 only). Double after split (DAS) is available at most UK venues; it allows you to double down on the hand you receive after splitting a pair, which is a useful option in specific situations the basic strategy chart maps precisely.

Late surrender is available at some UK venues and is worth looking for. Under late surrender, you can forfeit your hand and recover half your stake after the dealer has checked for blackjack. the late-surrender value is at approximately 0.07-0.08% off the house edge in a six-deck S17 game, which is meaningful at the margins. The Hippodrome's table games section lists its current game variants; check before visiting.

Insurance is offered when the dealer shows an ace. It pays 2:1 if the dealer has a blackjack, and costs half your original bet. In a six-deck game, the probability of the dealer holding a ten-value card under that ace is roughly 30.8% (96 ten-value cards in 312, minus any you can see). At 2:1, the break-even probability is 33.3%. Insurance is a losing bet at nearly all times. The one exception is when you're counting cards and know the remaining deck is ten-rich: see the card counting lesson for that conversation.

The Rule Set That Defines UK Play

Putting it together: the standard UK casino blackjack game you'll encounter at Aspers Westfield Stratford, the Hippodrome, or any major London floor is roughly this configuration: six decks, S17, double on any two cards, DAS, no late surrender by default, 3:2 blackjack, dealer checks for blackjack under ace or ten. That rule set, played with correct basic strategy, produces a house edge in the range of 0.40-0.60%.

Deviations from that baseline always make the game more expensive for the player, not less. A 6:5 blackjack payout (increasingly common on lower-minimum tables at busy tourist venues) adds approximately 1.39% to the house edge. our analysis breaks down every rule variation and its effect, and the lesson on table selection applies those numbers to specific London venues. The blackjack trainer at tools/blackjack-trainer/ lets you practise under the exact rule set you'll face, which is how you make the chart automatic before you sit down in a real room.

Key numbers

Rule variation	Edge change	Notes
H17 vs S17	+0.20%	Dealer hits soft 17 is worse for player
6:5 blackjack payout vs 3:2	+1.39%	Single most damaging common variation
No late surrender	+0.07-0.08%	Losing the option to fold borderline hands
No double after split (NDAS)	+0.14%	Restricts a useful doubling opportunity
Single deck vs six deck	-0.58% (single deck)	Partly offset by 6:5 payouts on single-deck games
Dealer peeks for BJ (US-style)	-0.11%	Saves you doubling into a dealer blackjack
Six decks, S17, DAS, 3:2, late surrender	~0.40%	Benchmark UK shoe game with basic strategy

Sources: our in-house edge analysis, UK Gambling Commission general betting rules, Hippodrome Casino table games.