Thanks Richard. The silly thought was to have a Land of Hope and Glory button. After all, Elgar was a Malvern man.
I've ordered an audio player board, which seems to have a few ways of controlling it. I'll know more when I get the data sheet and I have some support from people who are better with electronics than I am. I suspect the momentary contact could be used to tigger a burst of a few bars into the Aux socket of the otherwise unused radio.
