I have to go to a do at the end of the month. Dress code is evening dress, and it's at a swanky venue. I'm dreading it - I'm at peak winter fat (size 16) and feeling terrible about how I look. We'll be with lifelong friends of my husband and I know it shouldn't matter but I'm not looking forward to it because I'll look like the back of a bus. I am also feeling very resentful at having to buy a frock that will get worn once. Yes, I could choose not to go but on balance I think I should go.
So: any ideas where can I go looking for a dress I can try on in real life, other than the obvious John Lewis etc? I'm in London. I am menopausal with belly fat as well as a big wide bum, so somewhere that will have stock sympathetic to this - and my pathological hatred of clothes shopping full stop - would help! Budget up to £300ish if I can find something that will do for the occasional thing over the coming years. I've been looking at https://www.bombshellhq.com. Any other ideas?
I am also aware this is a very first world problem, which is making me even crosser with myself! Please help 