Do you recommend the natural history museum or the national gallery?? I can't decide which one I should try to see on our free time? I've been to London before but I didn't get a chance to see either of those.
Both are very good and worth a visit but if you're short of time I guess it depends what you're after. The National Gallery is full of impressive traditional artwork, a lot of which is very famous and gives a sense of the cultural history of the UK and Europe. The Gallery is based in Trafalgar Square so is perfect if you are looking to utilise more of your free time in central London near Buckingham Palace, Houses of Parliament and the shopping and restaurants that are located in the vicinity. The Natural History Museum is full of fossils and contains information about the history of evolution, with sections dedicated to the different animal kingdoms. The Museum is in South Kensington, so you'd probably need to get the tube there from wherever you're based. but it doesn't take long. Both attractions are free of charge to enter as far as I remember.