In Series 3, Steve Webster, head of visual effects, had to design five bears. An new bear for Leigh to wear, a stuffed one and three robotic ones, one which the head moved, one which the arms moved and one which both arms and legs moved.
To achieve shots where the viewer can't see the body of Leigh as the bear when there's no padding behind him, Leigh's head was through a blue screen and was then keyed in in post production.
Both the Michael Jackson sketches and the Mel B sketches of Series 3 were filmed in four days, two for each character, although not on consecutive days.
Mel B's stomach is actually two towels.
In the Christmas special, "Ho Ho Ho Selecta", when the Lorraine Kelly set came out of storage, the pillow which she sits on disappeared, and the production team had to cut up a pillow from a different sofa and stick Leigh in it, literally the moment Brian Dowling was coming to the set.