Great deal at Boots in Luton (Mall) - upstairs in the normal toy section. Bascially any set with a clearance label (showing 50%) off is actually 70%! Plus they are all included in the 3 for 2!
Lego General Grievous - 75112 - £9 (3 on shelf)
Lego Obi Wan Kenobi - 75019 - £6 (3 on shelf)
Lego Snowspeeder - 75100 - £12 (3 on shelf)
Lego Space Starter Set - 60077 - £2.70 (3 on shelf)
Lego Deep Sea Starter Set - 60091 - £2.70 (2 on shelf)
There are a few other small sets (no girls unfortunately) including one of the Microfighters for £2.70. I got the last Rey's Speeder (£6) and Deep Sea Submarine (£7.50) but potentially these could be around in other Boots? All the Friend's popstars bits were marked as clearance but there were none of these left in Luton.
Asked a staff member if they were national and she had no idea!