Went to Superdrug in Liverpool One this afternoon to get the £1.89 Lynx offer. Unfortunately the Lynx offer has now finished but by the tills they had 6 packs of TWIX (4 + 2 free) for just £1.
They also had Mars and Crunchie 4 packs for £1 aswell but the TWIX ones had two extra bars free in them. I presume the 4+2 packs are nationwide but even 4 for £1 is still pretty good value these days.
Unfortunately I'm on a diet so I ended up leaving the shop empty handed - more for everyone else I suppose!