Who and Potter

Dr Who bosses deny Tennant is to quit.
http://www.manchestereveningnews.co.uk/entertainment/filmandtv/s/231/231763_dr_who_bosses_deny_tennant_is_to_quit.html

The Royal Mail says it is beginning to plan a strategy for delivering the final Harry Potter book to UK fans.
http://news.bbc.co.uk/2/hi/entertainment/6214211.stm

Ballet, dinner and exhibitions

We're going to London tomorrow, to see "Alice in Wonderland" at the London Coliseum. Before that, we're thinking of going to an exhibition or two. Currently on our shortlist are:
- Velazquez, Cezanne and Dutch winter scenes, at the National Gallery
- English 16th / 17th century silver from Russia, at Somerset House
- Holbein (but this is a bit more out of the way).

Has anyone been to any of these? Also, can anyone recommend somewhere for a pre-theatre dinner in the area?