CP, I understand what you are doing but laying both at less than 100% and backing both at more than 100% can't be a good strategy, can it?

Take that back as I've just run the numbers on a hypothetical.
Lay 1.28 Back 1.20 Loses .80
Lay 4.80 Back 5.60 Wins 8.00
The equivalent of 10.00 on a 5.60 chance.

ps, still running the UK thing that you showed me?