Thanks, hopefully.
Regarding the smarkets join offer of a refund of your first £10 loss, PA recommend backing at smarkets, and laying elsewhere, to profit approx £7.50. I can't find any info in the t&c's anywhere that indicate they will only refund losses on a back bet, and not on a liability loss. If they will, then it makes more sense to me to utilise this offer at the same time as a free bet elsewhere, lay at smarkets - if back wins, you lose your liability (which is accounted for in your matched win, with profit left over), but are refunded £10, reducing your loss and increasing net gain across the bet by the full £10. If your smarkets lay wins, you gain profit of the smarkets stake, and your smarkets loss offer is intact for future....
Anybody know if that's viable? I know its only a few quid but it all adds up right. It's probably better to go with the recommended suggestion to be sure of something, but I thought I'd investigate this too just in case.