The M11 used to be run by Rugby, Preston and Cumbernauld drivers. Until a year ago the service used to change driver at Central Park, Rugby M6 J1 and then Walton Summit, Preston, however now it is operated by double man Cumbernauld drivers only so we choose whatever route is quickest generally. I've been known on the non stop service from London - Glasgow to come up the A1(m) to Scotch Corner, across the A66 to Penrith and up the M6/74. Journey times are surprisingly identical to the M40 which is the fastest route as it avoids all the nasty road works around Milton Keynes and if any road is likely to be closed overnight it seems to be the M1.