I haven't had one since 2020.
I asked 4 friends. None of them have a cheque book either.
We're all 40s-60s and haven't needed one for years. 2 friends' bank accounts could request a cheque book, but the other 3 of us couldn't.
I need to send a cheque or postal order to the DVLA. So it's a national government service asking.
And on another note, the man in the PO yesterday didn't know what a postal order was, so couldn't issue me one.
YABU - change your bank account to one which automatically issues a cheque book
YANBU - the DVLA needs to join the 21st century