£25 as usual for me. Used to get £50 and then laid it off for the free in play bet everytime so clearly I was dropped to £25 and since the stakes have dropped I have treated it as sticking a bet on I fancy anyway and then taking a free bet. Not bothering to lay it off now.
Lay off your pre-match qualifying bet on an exchange such as Betfair.
Then do your in play bet and also lay this off.
There are online calculators for this - you need to select the qualifying bet option when doing the pre match bet and then use the Stake Not Returned option when doing the in play back/lay bet.
Don’t let your qualifying and in play bets contradict each other. For example don’t back under 2.5 goals pre match and then back over 2.5 goals in play. They’ll ban your account before long if you do this.