We're off, we're off, we're off in a bumper car

When driving home today I burst into song, which came out of nowhere:

We're off, we're off, we're off in a bumper car,
Sixty cops are after us and we don't know where we are
Turning round the  corner eating apple pie,
The cop says "give us a bit" so I chucked it in his eye.
I went to tell me mother, me mother wasn't in
I went to tell me dad and he chucked me in the bin

We used to sing this song on bus trips, and I don't think I've sang this for at least 10 years.