coracle,
"Don't know if I' getting a bit kranky because I'm tired after what seems a shockingly busy start to the summer, but to all those dear folk who fly in and out of Heathrow, under 20 minutes delay means just that, whether you are holding at BRASO or LAM..........."
Quite right, you should have issued an "Expect onward clearance time".
Brasso is an enroute hold on the way to the terminal hold at LAM is it not?
Regards,
DFC