The programme in question was on maybe bbc 1 or Sky 1 around 1999/2000 and I remember watching The Adventures of Dodo and Conan the Adventurer (both cartoons) before.
The show was a 2 or 3 part series and was live action fantasy.
All I can remember is that the main character was a young girl and I think she wakes up in a strange fantasy place and she is greeted by some big muppet like monster I think. She’s scared of them and ends up in their village which I think has been attacked by something evil, so it turns out they aren’t the bad guys. Then she goes on a quest with them.
Another scene I remember is she is with her travelling companions and I think in the story the girl's mother is dead. Anyhow in this scene she is in something like a version of her reality, in her house. It's night and she is tiny; she sees her mother there asleep in bed and tries to call out to her but it's no use. And they carry on through to the next part of their quest.