Tesco has £3 off all clearblue items.
this includes digital pregnancy and ovulation tests, as well as the normal ones.
the link takes you to the ovulation tests.
ovulation digital test (7 pack) was £20 now £17
single digital pregnancy test was £10 now £7
online they only list four clearblue items, but instore they have the double pack of digital tests (can't remember how much for)