For anybody interested, there appears to be a some new German charters operating weekly from the end of May to the beginning of June:
Düsseldorf 25 April
Paderborn 2 May
Friedrichshafen 9 May
Erfurt 16 May
Hannover 23 May
Stuttgart 30 May
Hamburg 6 June
All operated by Germania on behalf of a tour company called Globalis. I knew about the Erfurt flight, but to see the extra destinations is very encouraging. I'm assuming this is one of the reasons why Jersey Tourism is in need of German speaking guides!
This is, of course, in addition to the weekly LH/AB flights to Dusseldorf, Hamburg, Hannover, Frankfurt and Munich and the charter from Vienna.