We've all been there, stood in the bookies, silently imagining how we're going to spend all of our winnings only to study the race cards on offer and realise we have no idea what they're talking about.

They could literally be written in Greek for all we know, which is fine if you're Greek but as most of us are not, FHM spoke to top trainer and announcer Mark Johnston to talk us through it.

Wave your mouse over the lovely interactive race card below and hover over the 'i' icons to learn the mysteries of gambling.

Fancy your chances on the Grand National this weekend? Then put a bet on with our pals at William Hill by clicking here. All bets that are more than £25 and made before 4:30pm on Friday will get a free £25 bet included. Easy money...

Mark Johnston is the announcer at Kempton Racecourses.

Words by: Stewart Hood and Guy Parsons