I've been invited to go to London for a weekend with some friends which is lovely and I'm really looking forward to it. These are people I used to work with and we've known each other a good few years and get on well but aren't extremely close iyswim
The only issue is that I'm really worried about the idea of sharing a room with someone. I know I snore loudly and I'm also really embarrassed by my IBS. 
My question is would IBU to ask to have my own room? I would do so with the understanding that I'd most likely have to pay more which I'm comfortable with. I just don't want to seem rude or inconvenience anyone else. Anyone been in this kind of situation before?
Thanks in advance for any advice!