What has government policy got to do with it??
Newcastle only has a FedEx Atr on a daily basis - no other scheduled freighters and certainly has no widebody main deck capability.
Doncaster from a standing start? Apart from the regular 747F's with fresh produce that have been operating for years.
BOH are bulk loading on to the maindeck of passenger 340's - more to do with Mr Stoddart than any airport masterplan
Most of the others have had main deck freighter operators for years - Manchester hasn't as it has concentrated on belly freight because of the previous space constraints.