London-themed decor looks great in a bedroom. Hang a large London wallpaper at the head of your bed to really cement your style. You can play around with the colours of the British flag by adding themed accessories or by painting one of the walls of the room red.
Complete the London style with a London-themed rug or bed linen. If you want to capture a feeling of wanderlust, you can even hang postcards of the city on the wall.