beerdrinker
The situation in Germany is not quite as clear cut as you suggest. Munich Approach is responsible for the separaion of IFR departures and arrivals from/to Eggenfelden and Straubing. Just because the approach control unit is not sitting at the airfield doesn't mean that there's no ATC. There is however no aerodrome control, just an information service.
That doesn't mean we couldn't learn from the German model in the UK, but if you want to have the equivalent of the situation in Bayern, you need to get LTCC to control approaches into Blackbushe. I doubt that would be arranged as cost effectively as it is with/by the DFS.