Not at all a rip-off. My local Booths has bottles at around £1.50 a pint and every week there's something on promotion at £1.00 a pint. Mrs Gti is trained now to check first the price, then the OG then the description, looking out for session beers at around 3.8 with any description like golden, hopped, light, fresh, and so on.
Even the cask beer in some of our local micro-brewery pubs has exceeded £1.50 a pint now - and Joseph Holts bitter must be up at around £1.65 a pint, I guess, though I haven't drunk it for a while.