EasyJet I/D

[DaveReidUK]

Originally Posted by jimjim1

I recall that Ryanair required passports on ALL flights.

That's certainly not the case nowadays. According to Ryanair's website, for UK domestic flights any photo ID matching the name on the booking is acceptable.

[Davef68]

I've used my Costco membership card on a couple of occasions on EJ

BA don't always ask for photo id when flying domestically