On 15 May 2021 11:38:14 +0100 (BST), Theo
wrote:


EX = Exeter
DD = Dundee
ML = Motherwell
CF = Cardiff
FY = Blackpool (Fylde)
KA = Kilmarnock
BB = Blackburn

That sounds like a really random collection of postcodes.

I was wondering if they were postcodes that happened to have islands in them
whose ferries might cause issues, but FY is only greater Blackpool and BB
and ML are landlocked.

I think they are the locations of airports used in RM's overnight
network, probably default routing for those areas from the vendor's
location. (In 1995 RM was using 32 charted flights from/to 21
airports. Don't know what the current situation is.)