I suspect there's too much light pollution in this area to get really good results, so I may end up giving it to someone who lives outside London or can take it to remote areas. But I'm going to try my hand at astronomical photography first, it'll be interesting to see how it goes.
Later - clouded over, of course! But I think it's OK so I've ordered a camera adapter, it isn't hugely expensive - just a tube with a Nikon mount at one end and a tube the diameter of a telescope eyepiece at the other.