just been to stratford upon avon with the caravan, 350 miles there and 350 miles back
got to within 5 miles on the way there then there seemed to be no power when i dropped a gear while passing a lorry on a hill, it was like this for the last 5 miles, unhitched the caravan, went back out in the transit and it was fine, it was fine to begin with on the way home aswell untill i changed down a gear again on the motorway, no power, managed to get into a services, turned off and restarted the van and it was fine, carried on our way,
it happened another few times on the way home, eventually nearly everytime i took my foot of off the throttle and tried to accelerate again, there seemed to be no power but as soon as i restarted the van it was fine again
van is a 07 2.2 fwd
i had a similar problem with a diesel focus which turned out to be the throttle pedal