Found very good clearance deals on stationery in two different Tesco stores, so sale may be national.
Deals found in Tesco New Square:
30cm Ruler for 12p
14 piece stationery set for 25p (included fountain pen, ink cartridges, biro pen, pencils, ruler, rubber and sharpener)
Complete stationery set for £1.60 (included 10 pencils, 8 pens, 4 sharpeners, 4 rubbers, 4 marker pens and 4 highlighters)
Deals found in Tesco Spring Hill:
5 Slick Ball Pens for 25p