I have checked while in Cambridge City Centre this morning, and there is no problem with getting lira, all the travel agents, Post Office, M&S, bureaux de change etc. Probably have enough for my holiday in June but bought a couple of hundred pounds worth at a rate 3.468 at eurochange (eurochange.co.uk) who are offering a better rate if you buy 1000 lira. They also e-mail you when the rate changes, charge no commission, and have a buy back option. I understand they are a nationwide company, and it certainly the best rate around today in Cambridge.