Unless something has changed drastically, do yourself a favor and go elsewhere. Trust me, it isn't worth it. Here is my recent experience.
https://www.flyertalk.com/forum/28861138-post61.html
And it is a looooong way from the BA boarding gate, which was even more nightmarish. We were in F and stood in the premium boarding line. The agent manning the general line scanned all of them through first, leaving the premium line standing there for 15 minutes. When we finally got into the cattle pen that is the waiting room, there were no seats. It was nowhere near an F experience.