Yip, I couldn't argue if I got done for going 77mph on the motorway. However I'd consider myself unlucky if that ever did happen.
However it's a calculated risk, that shortens my journey by about an hour in flowing traffic, and to this point I've never been pulled over for doing 77mph on a motorway.
Your lucky as my mate got done on the M1 by a chopper for doing 75 MPH,
not sure the 77 MPH is a valid excuse down here.
Sure all on here will tell me different, which is good as I'll now up my cruise to 80 MPH.