I reckon I could aim for £1 - £1.50 a pint via chilled cans/bottles. Perhaps not fair to compare as there's more hassle with cans/bottles, but it would maybe make me sway towards the latter.
I'll have a look at Camden Town. Check Sam Brooks which sounded ok too.
what's your target price per pint that puts you off the appx £2 mark? what extra value / saving are you aiming for?