i think the bbc policy on the Derry thing is, the first time you say it, it has to be Londonderry, but after than you can call it derry as many times as you want.
I also remember noticing during the elections, the Euro MP I think, on the vote ballot, the was 3 guys from there. Beside the Unionist it said Londonderry, beside the Nationalist is was called Derry, and the independent (some farmer guy) was L’Derry… I thought that was funny