Using Combination Forecasts at UK Bookmakers

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Combination Forecasts: The UK Bookmaker Alternative to Wheels

A combination forecast is the UK bookmaker’s version of what the rest of the racing world calls a wheel or box exacta. The product is native to every major British betting platform — Bet365, Ladbrokes, Coral, William Hill — and it works in exactly the way you would expect if you are familiar with wheel bet logic: select multiple horses, generate every possible ordered pairing, and collect if any of those pairings matches the first two finishers.

The terminology trips people up more than the mechanics. Search for “wheel bet” on a UK bookmaker’s site and you will find nothing. Search for “combination forecast” and you will find the exact product you were looking for. This guide strips away the naming confusion and focuses on what matters: how the combination forecast works, how to structure it like a wheel on your bet slip, and how the Computer Straight Forecast dividend determines your payout.

Mechanics: How a Combination Forecast Covers Multiple Orders

A straight forecast is a single bet on two horses to finish first and second in that specific order. You name Horse A first and Horse B second. If Horse A wins and Horse B is runner-up, you collect. If they finish in the reverse order — Horse B first, Horse A second — you lose. One combination, one unit of stake.

A combination forecast takes a group of selected horses and generates every possible ordered pairing among them. The formula is straightforward:

Number of bets = N × (N − 1)

Where N is the number of horses you select. Choose three horses and the combination forecast produces 3 × 2 = 6 straight forecasts. Choose four and it produces 4 × 3 = 12. Choose five: 5 × 4 = 20.

Each of those straight forecasts is a separate bet, each charged at your unit stake. At £1 per combination, selecting five horses costs £20. The combination forecast covers every possible finishing order among your selections for the first two positions. If any two of your five selected horses finish first and second — in any order — one of the 20 forecasts pays out.

Worked Example: Four Selections, £1 Stake

You fancy four horses in a ten-runner race: Horse 2, Horse 5, Horse 7 and Horse 9. A combination forecast generates 12 ordered pairs. Horse 2 first and Horse 5 second is one bet. Horse 5 first and Horse 2 second is a separate bet. And so on through all permutations. Total outlay: £12.

The race runs. Horse 7 wins, Horse 2 finishes second. Your bet on Horse 7 first and Horse 2 second is a winner. The payout is the Computer Straight Forecast dividend for that specific result — let us say £34.50 to a £1 stake. Your net profit is £34.50 minus the £12 outlay = £22.50.

On the 2021 Grand National, the CSF for the winning combination was £882.65 to a £1 stake. Had you held that pairing within a combination forecast, the return would have been handsome. But the Tote Exacta for the same result paid £2,053.30 — more than double. That gap is a reminder that the combination forecast and the Tote Exacta are competing products for the same prediction, and the smarter punters check both before committing.

Structuring a Combination Forecast Like a Wheel

A standard combination forecast treats all selected horses equally — any of them can finish first or second. That mirrors a box bet. To replicate a wheel bet, you need to fix one horse in a specific position and rotate the others through the remaining position. UK bookmaker bet slips allow this.

On Bet365, Ladbrokes and Coral, the forecast interface lets you assign horses to specific finishing positions. Tap “1st” next to your key horse and “2nd” next to each of your other selections. The system generates one straight forecast per pairing — your key first, each other horse second. This is functionally identical to an exacta wheel. The cost is the number of “2nd” selections multiplied by your unit stake.

The critical distinction: if you select “Combination Forecast” without assigning positions, the system creates all ordered permutations including your key horse in second. That doubles the number of bets and the cost. For a true wheel — key horse locked in first — you want to assign positions manually. Mobile betting accounts for more than 70% of UK online gambling activity, according to Gambling Commission data, so most punters will be doing this on a phone. The interface varies slightly between apps, but the principle is consistent: assign your key to first, select multiple runners for second, and confirm before placing.

Partial Wheel on the Bet Slip

Narrowing your second-place selections replicates a partial wheel. Instead of marking every remaining runner as “2nd”, choose only the three or four you consider realistic contenders. In a nine-runner race (close to the BHA’s 2025 average flat-field size of 8.90), a full wheel creates eight forecasts; a partial with four selections creates four. The saving is real, and the analytical effort of identifying which horses to exclude is what separates structured betting from scatter-gun coverage.

CSF Dividends: How Your Payout Is Decided

Every combination forecast placed at a UK bookmaker is settled at the Computer Straight Forecast dividend. The CSF is not a pool product — there is no shared pot. Instead, it is a mathematical formula that uses the starting prices of the first two finishers to calculate an industry-standard payout. The formula is maintained by the British Horseracing Authority and produces the same result regardless of which bookmaker you used.

The CSF captures the approximate value of the result relative to the market. If two outsiders fill the first two positions, the CSF will be high because their starting prices were long. If two favourites dominate, the CSF will be modest. The formula includes adjustments for overround — the bookmaker’s built-in margin — so CSF dividends tend to be slightly lower than a pure probability calculation would suggest.

One advantage of the CSF over a Tote Exacta is predictability. Because it is derived from starting prices, the CSF is consistent and not affected by the volume of money in a pool. You will never have a CSF distorted by a single whale bet the way a thin Tote pool can be. The disadvantage is that the CSF compresses extremes: on unusual results, the Tote Exacta frequently pays more, sometimes dramatically so.

For the combination forecast punter, the practical approach is to default to bookmaker CSF on quiet cards with small Tote pools and switch to the Tote Exacta on big race days when the pool is deep enough to generate reliable — and often superior — dividends.

Build Smart, Compare Often

The combination forecast is the most accessible exotic bet in UK bookmaker racing. It requires no special account, no Tote registration, and no understanding of pool mechanics. Select your horses, assign positions, confirm the cost, and place the bet. The CSF takes care of the payout calculation.

Where the combination forecast rewards extra effort is in the structuring. Fix a key horse in first and you have a wheel. Leave positions unassigned and you have a box. The cost difference between the two is substantial, and the wheel is almost always the better choice when you have a genuine opinion about the likely winner. Learn to build wheels on the bet slip, compare CSF with Tote dividends after each race, and your combination forecast game will sharpen with every card you bet.

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