Apparently I have 2 versions of the Debney theme and 1 of them has a slightly faster tempo. 1 is from the official TV Movie Soundtrack and the other was on a special one off CD that was never released officially in the UK, although I got a copy from the Who Shop like 10+ years ago which I can't seem to find.
The first is the opening theme that fades to the music at the start of the show, and the second has a longer intro and ends with the ending of the closing theme.