tmmorris
Notwithstanding what the CAP413 says (I'm fully aware of its contents thank you) I'm stating what is preferred from the point of a
current LARS controller. CAP413 is fine for guidance - but in that particular circumstance it's time it was changed. A typical example is when someone uses the CAP413 call, asking for LARS, and then when you quiz him on what
type of service they want it turns out to be a FIS - look up the definition of 'FIS' and you'll see the contradiction.
CAP413 also says to report your heading in the 'pass your message' call. From an ATCO's viewpoint we're not interested in your heading unless we ask for it - after all being, in most cases, VFR, you can fly whatever the hell heading you like
Estimates are another piece of useless information, especially as far as radar units are concerned. We know what you are, normally we can see you, we know how fast you go. If we want an estimate (i.e for an airways joining clearance) we'll ask for it - but other than that a lot of the time it's superfluous information.