To me, British Orthodox means the idea of bringing Orthodox to the British People, not a British "version" of Orthodoxy.
When people think of the orthodox Church in Britain they think of the Greeks, The Russians, maybe the Copts or the Syriac and Serbian Curches. This naturally puts people off of attending, I myself attended a few services in a Russian Orthodox Church before discovering the BOC and found it too centred around the needs of Russians in the UK. Being part of an Orthodox Church centred around a British community just makes it feel more comfortable and welcoming than one centred to a migrant community from an Orthodox majority country.
British Orthodox in my view is a way of communicating the Orthodox Church to a British Audience. Such things as a fully English Service (apart from the Kyrie Eleisons :? ), a church community centred on the needs of the Native British community (I hate using that term!) and other things which seem focussed on a community not born into an Orthodox environment.
"The true Christian is a warrior making his way through the regiments of the invisible enemy to his heavenly homeland." - St Herman of Alaska.