I haven't had a cheque book in over a decade but don't use contactless either as I rarely make small purchases. Chip and pin works fine for me. Like others I like to carry a minimum of 20 quid cash no matter how much is in the bank, I've had cards declined in the past for no apparent reason so would feel uncomfortable only carrying one card and no other form of payment
A quote for those blessed with a spouse:
Lighthearted - How long do you display Birthday Cards?


but like you I need cash at the moment: collection boxes, the odd small currency purchase and more.