I did 3h 45m on Thursday evening - it's even a great drive in the dark!
Although the first part felt really SLOW on Sunday afternoon it was only 4 h - left about 2:40 was at the hoverport at 6:40. The constant 120mph on the autoroute and the dual carriageway helped.
Tried Mulsanne on Thurs night @ about 01:30 - rolling start frm the last roundabout, reached 120 before bottling - I'm getting too old for that lark...