I think Anastasia was called after an aunt, probably Digby's.

Hague is obviously a Treen, but the only plausible Mekon would be Maggie Thatcher. Remember the Private Eye version in which she featured.

The thing about Dan Dare is it's not in the future, it's in a present that didn't come about. To do it properly you'd have to set it in some kind of parallel universe, which would be much more fun - you could have characters from our present world turning up in odd situations. Tony Blair as a hairdresser for example, Bob Dylan as a bank clerk, John Lennon as a bishop - that kind of thing.