on average look to pay around the 200/250 quid per room for painting, the price can vary depending on how good your walls are and any making good that needs to be done like filling
and about 15/20 per roll for the wallpaper, but other factors such as how many windows and doors are in the room can effect the price but not by much, these just present obstacles that take a little longer to paper around
you should defiantly not be paying 500 quid as one poster has said that's a little high, if the walls are good and there's little prep to do expect a price of about 350/400, this is the price i would charge, and i do work in London, it should take 2 and a half days there abouts again depending on any prep work that needs to be done
it should only take one day to complete the living room and up to one for the papering - depending on the pattern of wallpaper.
if you are supplying all the paint and the paper, then would not pay more than £150 per room as not worth it. Ignore the comment on the Polish painters for half the paint, a ridiculous comment to make!
For such a small job, do it yourself. Take your time and you will get the same result.
wouldnt like to hire a painter in london ....here goes... for paint work in ur living room approx £80 and for ur wall paper roughly £10 a roll.... thats getting someone to do it on the side ie: a homer.... gettin in a company to to do it expect little change from £500... good luck ...
if its for labour only (you are supplying the materials) and also depends on where you live in the uk in the london area tradesmen command higher prices but £200 for your living room and £300 for the bedroom