Trouble is that a/ dh's German is virtually non-existent so family language is English anyway, and often at the weekend I just seem to stay in English even if it's just me talking to the dc's, and b/I have been in the UK for so long now and feel so comfortable in the language and obviously use it all day every day and watch TV in it etc that it just comes naturally.
The children's German skills are varied - dd1 is very good, dd2 so-so (but her German really really picks up when we go over to see my Mum, which we do virtually every school holiday), ds is speech-delayed so it's difficult to say.
They do watch German TV and seem to understand virtually everything and I read to them in German (ds daily, dd's alternate days - the other day they read with dh).