Just the same as Gatwick & Heathrow, but Ryanair aren't the only operator using STN... and whilst its true they may have about 70% of the departures during the specified 0600-0800 window its a rolling process because in the next two hour period between 0800 and 1000 they have only 13 departures... 56 departures is a long way short of the 255 departures the Mail refers to.
I know it's a cattle-market at any of the London terminii, these days and BAA & HMG couldn't give a hoot.
My initial comment stands I'm afraid, this is just the Daily Mail hyping thing up...
The sad thing is of course that those who impose the O.T.T. regulations are never subject to them, having access to corporate jets and/or the RAF VIP Squadrons...