I was last there for a job interview and my future employer had kindly provided an apartment on Jermyn Street, so I spent some time exploring the shops. Wearing a waistcoat myself, I cannot comment on the snootiness factor (at least no-one mentioned the war...), but I did not see a wide variety of razors, either. However, I was allowed to take a close look at their products, and it was fun.

Happy shopping,
Robin