Yup deeda my DH would shop there if there was anything that fitted. But menswear is run for and by a bunch of skinny guys. Last time we tried there was, in a huge menswear dept, not a single assistant there to help if one happened to have a question like "Do you have any flat fronted charcoal business trousers in a 42 waist and a long leg length?". Just one woman supervising the fitting room, who could not move from her post and actually "assist".
Someone (with a rugby playing husband) gave me the tip that Tesco do chinos and jeans that fit men with big thighs. He got some chinos there (Ok for work but they don't last long - but they wouldn't at the price) and also some black jeans. First time he has had a pair of jeans that fitted!