Thanks for that. It was copyedited by a GOCE editor who spent a lot of time on the citations which I thought was outside the concerns of GOCE and was non-plussed when this copyedit was complete in a day. At that point I did not know how best to proceed, so continued to submit it for GA as was my stated reason for requesting GOCE. Having just spent some time on the intro I quite see the problems and will address them as best I can.    