Of course, everybody on the radio heard that first transmission too, didn't they?
Use the airport identification at the beginning and end of every transmission, but don't bother to identify the aircraft save for once when entering the traffic pattern? You don't see a possible break in the logic, there?
How much more difficult is it to identify the aircraft when using the callsign? Skyhawk G-ABCD is harder than G-ABCD?
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.
I do know that as a professional pilot, and I also know that CAP413 directs you to identify the aircraft type as part of your callsign, as Slipslider has noted. Do you know that?