I've never seen a queue at the Natural History Museum. Is there some sort of special exhibit going on or is it just summer and tourist city there? But you were next door to the V&A! I love that place more than any other in London.
:)
The Banqueting House is very interesting and they give a good guided tour. Enjoy!

Now you've made me long to be in London again which I will be soon enough.

I'm glad you had a good time at Writerconuk.