We see them here (5 miles away) all the time obviously. The QM2 is now colloquially known as "the block of flats"! However we also see the similar and perhaps bigger ships as well.
There were also other ships with the QM name:
1. PS Queen Mary
http://myweb.tiscali.co.uk/tramways/...EarlGodwin.htm
2. TS Queen Mary
http://en.wikipedia.org/wiki/TS_Queen_Mary [in London]
I suppose the John Brown-built ship got away with it as it was the RMS Queen Mary originally?
My late father-in-law was on the HM QMT to Canada when he was sent over under the Empire scheme.