There are constant rumours about BBC Radio Four's LW transmitter in Droitwich. That has been going since the 1930s on basically the same channel, and it's getting harder and harder to source replacement parts. It clearly won't be long for this world, but we don't have a switch off date yet.
I hope the last program aired is the Shipping Forecast, which most likely was among the first things to be broadcast over that transmitter.