Boxes of 7x cetirizine hydrochloride 10mg tablets for 19p (one tablet a day). The brand is 'Pollen Shield'.
I saw these right next to the till in North Shields branch, also saw them in Sunderland so guess they'll have them in most stores.
Bargain for hayfever sufferers (I usually pay 45p for 7 tablets in Wilkos and I thought that was cheap, until I spotted these). I know some people will say 'wow, a 26p saving' but it all adds up, especially if you go through these like I do!