Weird isn't it? Balamory is all single people as far as I can see. Granny Murray is about 35 so she was clearly a teenage mum, as is her daughter. Charlie and Lola's parents seem fairly competent but never appear. Only the Pontipines and Wattingers appear to be couples with children and the Pontipines are neglectful in the extreme.
2rebecca most of the inserts in Teletubbies are done in the Midlands area, not London. Of course that is also a very diverse area.
On a slightly different note, is anyone else concerned about the Criminal Justice System in Toyland? Mr Plod acts as police (obv), judge and jury by himself, to me this flies in the face of all natural justice and democracy. The goblins have never yet had a fair trial.