I was in the Royal Courts of justice today doing my day job when what should I come across but a sculpture of Lord Woolf by Contemporary Artist David Mach. It was made out of coat hangers and did look a little out of place in its traditional 19th century setting.
Also I don't know whether you have been to Trafalgar square recently but there, standing proud, on one of the plinths in a sculpture by Mark Quinn entitled "Alison Lapper pregnant". Again a really striking example of contemporary art.
Then of course in Aldeburgh you have the tribute to Benjamin Britten - a 12 foot sculpture of a scallop by Maggi Hambling (although not all the residents are that keen on it)