Just thought I would let anyone who gets migraines know what I found out today - Imigran Recovery has been discontinued. There have been supply issues for a while - I think this must have been due to stocks being run down after production stopped.
Anyway - there is an alternative available called Migraitan. It is exactly the same thing: 50mg of sumatriptan supplied in a box contains two tablets, available without prescription and costs £8.00 in Boots. The pharmacy assistant there gave me a card for it too as a replacement for the Imigran one.
Four different pharmacies all run by different companies weren't aware of this - some of them didn't know Imigran was discontinued.