I recall seeing a film, probably in the 1970s, featuring two kids, a boy and a girl aged probably about ten or twelve, getting involved in an adventure. I would say the film was made during the 1960s, and had a Disney feel to it (it could have even been a Disney film, though none of my searches have ever turned up anything in that direction). They may have had a dog with them. I think the kids spoke with British accents, and it was probably either a British or American film.
One thing that was definitely involved was an MG T-series motorcar. It looked a little like the image below, but it could have been a different marque:
I think the car was red, but it might have been dark green. I remember them driving at speed through a forest, though I don't think that the kids were driving the car (so an adult may have been involved). I can't really remember anything else.
Edit:
- It was not Chitty Chitty Bang Bang. The car was newer than CCBB, and could not fly.
- It was also not the Gnome Mobile. The car was definitely an MG T-series
