That's probably what I'm going to do, but there is an oddity with he sizing. I wear a 9.5 US, I usually go down to a 8.5 when ordering British sizes. However the website equates the British 9 to the European 43 and I know I usually wear a 43. So I'm confused. If you say I should go a full size down then that makes me feel better.
I hate my feet. I wear a full size difference in some brands due to their shape (Meermin I wear 8.5UK to 9.5UK depending on last). Trying to remember what I wore in Rain.
Herring, I bought from once. Went half size down (9.5UK) and the shoes were way too big. Full size is probably the way to go.
I second Clag's advice. US 9.5 is really EU 42.5, not 43 (depending on the last), and if Herrings uses Loake to make their shoes for them, Loakes (rebranded through Charles Tyrwhitt, in my experience) run large - go with the 8.5 UK.