think i sorted it now, just put £25 on hatton at betfair with a potential return of £40 summat pence and i get a free £25 matched credit for being a new user,
then i went to paddy power and put £10 on castillo with a potential return of summat like £30 and i got a free £10 bet so i put it on hatton on paddy power so the least i will be getting back is £30 and a £25 bet and the most i will get back is £45 and a free £25 bet.