What's this bud?!
Stick £100 in your Bet365 account.
£50 on >0.5 goals in whichever game you're using.
Use another betting site to bet on No Scorer to cover the £50 and make sure you'll not lose more than 2 or 3 quid.
Then you can put £50 in-play on anything in that game. If it loses, they'll refund it in cash.