Thanks for all your replies.
I think we'll get them changed, although it's going to cost us £39 it's easier to carry around than passports and as you said, Penny, it's a lot less hassle to lose driving licences than passports.
I was in Index last year validating my new Index account card and showed my pink driving licence as ID, the guy behind the counter refused to accept it at first, insisting that all driving licences had photos!!! Luckily his manageress was older than him(and more knowledgable!) but it made me feel ancient, I'm ONLY 42 but he made me feel like his great grandmother!!! so it will probably be handy to have a photo D/L for home as well!!!
Elaine