As SB says, you will rarely see too much holding at ALKIN as it gets in the way of LCY/BIG traffic. We try and hold there at 3000 feet if it is the "heavy stuff".
You will often see BIG IFR trainingttraffic there though, on ILS/VOR trg approaches at 1800-2400 ft.
Oddly enough - this morning there was in interesting call from BIG tower.... (top chicks!!!)
"We think two Swedish Aircraft are heading South from us at 2000ft"
And when given a squawk they were indentified and looking for DET (Doh!)
They were turned East (now in the Gatwick CTA at 6 mile file for runway 26) and sent to us on Thames.
After establishing that they were now heading East out of the Zone/CTA, I advised them and asked "are you aware of the gatwick zone and the controlled airspace in this are"
The pilot simply replied... "not Particularly!"
They should be in France by now.... god willing!