Had to take a Gert Big Bus down to LGW a couple of months ago. Problem was it was about 4 tonnes overweight due to it coming out of maintenance after a fuel leak. The grown ups wanted to defuel it until we explained it would take longer, cost more etc etc. Considered dumping it but thought someone might notice and dob me in and we couldn't be arsssed to organise a dump area route. So we went up to 190 and dirtied and blew the fuel out the tailpipe. Now to the point - I had told ATC what we were doing and why we were at 180kts. One sector failed to tell the next sector south of HON............ The Shamrock RJ came past us quite quickly, I was mildly impressed