I lucked out and found this place by virtue of being in the right place at the right time. Decided to get a hair cut after doing some shopping on Jermyn Street, and searched nearby barbers, finding this place with multiple (well deserved) five star reviews. It was quiet, despite being a Saturday evening, and the guys were super accommodating. Not cheap, even by London standards, but worth every penny.
Hair shaping, beard shaping, and ear waxing were integral parts of the total experience, which included total design of all hair. In particular, ongoing discussion during the design and implementation was helpful and educational.