[Dadeki]

Birmingham certainly did do them when they tested the 'Child Rescue Alert' astons in 2006/7 time - not sure they ever actually used this in anger or if it's even a thing anymore - they did make a song and dance about it at the time. Might have just been a trial? But they tested it 3 times over network programmes in the evening - each time they did it they'd have a pause symbol top left of the picture then the aston would appear (the standard Midlands Today aston of the time with a yellow band across the top).

For anybody interested, here is an article from the BBC published at the time (May 2007) detailing the alert system, as well as providing an example image (albeit a poor quality one) of how the system looked when utilised in the south east:

news.bbc.co.uk 

newsimg.bbc.co.uk