Manstonman
I'm sorry that my quoted driving times don't suit your argument, so let's try AA Routefinder instead for the times to Canary Wharf:
STN 78min
LTN 75min
SEN 69min
MSE 108min
Perhaps the AA are "having a laugh" as well as Google.
As far as whether bizjet traffic forms an important element of London area traffic, are you aware that in 2007 Luton had 25,600 such movements and Farnborough 26,500?
I would have thought that, with MSE as well placed as you claim to cater for London bound/originating traffic, it would be a good idea to try to pick up some of that business. Or is it just passenger flights which contribute to airport revenues?