ICAO the dreaded word [sort of]
I was following this with some interest ,having used "radar heading" for many trouble free years, until someone mentioned ICAO and standardisation. Well it all depends what and where you are. Rules at Heathrow for example are so different from the rules applied at Regional [hate that disgusting and derogatory term] airports that you would be forgiven for thinking you were in a foreign country. I've often suspected that the CAA consider that a race of super pilots exist and that they are the ones who fly in and out of the bigga-mega-airports and so as not to overburden them with super waffle trivial verbal overexcess it is all missed out.