What frequencies do English Heritage sites use?

[StormShadow]

What frequencies are English Heritage sites likely to use?

I know they are using digital, my first guess is they could be using UK General 449 etc but I know that they use VHF digital at Dover castle for example.

Do all English Heritage sites all use the same frequencies or are they different? and do they use VHF or UHF or both?

[DuncanH]

Radio Reference UK lists at least 21 different frequencies from 164 to 454 mHz. Some sites have more than one.

[paulears]

They tend to source locally, so individual sites do their own thing, rather than have an officer tasked with national coordination. I understand it’s not an organisation where staff travel very often to other sites, so commonality isnt really needed.