Question Author
OK, I'm sorted. Seems you search for an ensemble and then for the programmes within it. Very hit and miss unless you want to listen to the verbal diarrhoea that passes for music these days; especially on local stations. Answer was find ensembles that have "national" in their name and pick suitable stations from various length lists. How difficult can it be to have a list of programmes, within ensembles within channel numbers?
Another case of "Take what I give you not what you really want"