London weekend

I'm contemplating going to London for a weekend if I can find a reasonably priced plane/train ticket. In the event that I do find this, I would love to have some well-informed recommendations for where to go and what to do. In all likelihood, I will be there only two full days, a Saturday and Sunday. If you have any ideas on the most clean, comfortable and not-too-expensive hotels, best places for afternoon tea, cute boutiques or restaurants serving upscale Indian cuisine, please let me know. These are not the only things I am looking for, but they are at the top of my list.

Also, everyone who knows me well knows that I like flowery things and flowery places. Any indications about where to find the most flowery charming corners of London will be greatly appreciated : )