I am going to wales late summer for work and have been told to take a rain coat just in case. Sorry if this is cryptic, but where I am going, I enter and can't leave until its over, so I won't be able to just leave the raincoat in the car if its too hot, or nip out to collect it if it starts to pour, so basically I need something I can wear for any kind of weather! I like seasalt although the coats I've had from there before have been a bit too autumn/winter so I'd need something lighter. I'm also a size 20 (working on this!) so need something plus size but not a tent.