I can confirm the closure announcement on GHR is broadcast hourly at :03 past the hour where the weather sponsor would normally be heard.
No date is given however.
I have heard it in
990 Doncaster
1035 Ayr
1152 Newcastle
1152 Glasgow
1161 Dundee
1548 Edinburgh
1584 Perth
I cannot yet confirm if it is heard on 1107 Inverness.
Will confirm as soon as possible.
James Robinson (2023-11-11)