Been through several times at 05:30-06:00 recently, queues back to the bp check desk.
On BA no problem, as the magic fastlane sticker gets forward, but I've been travelling on SN a bit with no fastlane. Only about 15-20 minutes from the bp "check" though.
Fastlane is devalued somewhat by ryanair -- as takeoff time approaches, MAN staff shout down the line for passengers flying before xx:xx to come forward. On Wednesday AM, they specified Ryanair passengers before (30 minutes time)
I assume Ryanair pay for this service?