just visited local sainsbury's in Cheadle hulme and there is a huge section of stationary going in clearance section, been there for atleast a week.
coloured drawing pins100pk - 10p
large colured paper clips 35pk - 10p
small coloured paper clips 100pk - 10p
coloured foldback clips 30pk -15p
eraser and sharpener set 15p
stapler and hole hunch set 50p
Frozen eraser 4pk 60p
various other items from 10p to 90p.
too many to remember and list, worth the visit if you are around. it might be good for party filler etc.
it might be national on other sainsbury's, i can not confirm.