Did you mean as a government or a nation? Um, the UK is part of the ESA (European Space Agency) and that is partner in the ISS. Skylon is a private company venture, though has won a governement grant. Does look quite cool too (in fuction and I just like space planes!). So the UK is doing it's bit, though I'd like to see a lot more! And definitely manned missions again without having to rely on NASA or the Russians. Maybe when we're a bit less skint though...