I can confirm (having talked to it!) that it was Vortex xxx from Odiham waiting for runway 28 deps at London City before continuing it's jolly (errr I mean training flight) up the Lea Valley to a secret airbase north east of Stansted.
Can you get a better radio please........
Sometimes we think it is a good idea to hold military traffic just to see how long some spotters pipes up on here!
Hey Rude crewman - that is my joke when I bore 18sqn with the helilanes brief!!!!! (good point though)
Rumour has it that Heathrow would rather speak to a R22 PPL out of Denham than a 18 Sqn cab.....!!!!