Would YOU cash out? Racing punter stands to win more than £500,000 from a £5 accumulator placed last June if the odds-on favourite wins tomorrow's first race at Cheltenham
- A racing punter won't rest easy tonight with more than £500,000 on the line
- Paul Dean placed a £5 accumulator last June, when betting on Royal Ascot
- By placing the bet so early, he got higher odds than the current bookies' prices
- Now if Envoi Allen wins tomorrow, he could win over half a million pounds
- Betfair have confirmed that he has been offered £275,000 to cash out