Today I saw First Response pregnancy tests in Superdrug are BUY ONE GET ONE FREE so only £10.79 for 4 tests.
(Single test packs are also on BOGOF so £7.49 for 2 tests)
These are super sensitive pregnancy tests - you can test 5 days before your period is due. I thought this info might be useful to someone because they are normally so expensive.
They are also available online.