Having never operated an aircraft overweight in the UK, I am unfamiliar with the procedures.
I can't find the FAA guidance note, but if you go to :
http://www.casa.gov.au/rules/1998casr/021/021c09.pdf
They quote the FAA as the authority.
As you can see, no application required just a notification, and even that doesn't need to be posted until after the flight has taken place.
As a point of interest, reasons other than ferrying are approved overgross. If you look at what is ops normal in the Ag sector you can see how ridiculous assertions of hell and damnation for going a little over really are. Day in, day out, at 60% overweight are approved with the bare minimum of formality, and 60% is a suggestion not a requirement.