If someone is going to use their callsign, why not include the aircraft type? I can't read your registration number from a mile or two away, but I can tell what type of aircraft you are. If three airplanes end up competing for the same spot of airspace, one a Cessna Skyhawk, one Piper Warrior, and one a Learjet, G-ABCD won't tell me much. If instead, I hear "Borton traffic, Skyhawk G-ABCD, three mile final, runway 09, Borton," I have a much better idea of what type aircraft is calling, where it is (three mile final as opposed to short final or ten mile final), and what to look for.
Because the local standard phraseology is designed differently and CAP413 sets out the phrases to be used in the UK.
You should know, as a professional pilot, that the purpose of having standard phrases is to achieve standardisation and increased comprehension. Tenerife in 1977 taught us the importance of that.
Anyway, as you said in an earlier post, you should be looking for the traffic with your eyes, not your ears.
As a 'non aligned' person, I find that the radio phraseology in the UK and USA is different, but works well in each domain, so long as people respect the mandated phrases.