[Stuart]

That's the point - as a viewer you are most likely to only ever see your region, so there's no need to enforce a consistency to appease the nerdy few - especially if there's a use in making them more visually different as names for internal reasons, perhaps.

The point is you're watching a REGIONAL version. It should be differentiated by the fewest letters possible as a consistent policy.

That's 2 or 3 characters, with no unnecessary squashing into the HD at the end of the name on the EPG which just looks very messy and sets off my OCD.

Internally they have only ever been identified by 2 letters relating to the location of the broadcast centre, and it's not the ones used on the new regional HD services.