Don't forget Berwick switched to tt at the same. I'm also sure south Oxfordshire switched to meridian.
Oh yes, you're right. That reminds me, also at DSO in the Granada and YTV regions, some relays
that were split between BB and ITV regions near the Lancs/Yorks border were unified (which was the reason why Berwick moved from Border to TTT too)
I think also the Lincoln relay moved from Central East to YTV, (to match the BBC's arrangement) ?
Lincoln was the other way around: BBC East Midlands to BBC E Yorks & Lincs. ITV Yorkshire was always there.
Ashbourne went from ITV Central West to East joining BBC East Midlands as part of the alignment process.
Interesting that Ridge Hill's PSB2 West multiplex that allows N Gloucestershire to choose between ITV Central or ITV West is changing soon to QSPK mode with a reduction in power.