No 9am delivery service for Guernsey

[joolswills]

Currently the code shows it as available - but according to royal mail it is not

https://personal.help.royalmail.com/app/answers/detail/a_id/98/~/sending-mail-to-the-channel-islands-and-isle-of-man

This was something that was fixed before, but has appeared again with the recent code refactoring.