Indeed - thanks.
Answering my own question:
PAL and NSTC recordings run at different speeds.
A 180 tape would record 180min PAL but just 129min in NTSC (US etc)
So Titanic etc was split over two tapes in US, but one here.
Stand down, all. Thanks.
Just read that Titanic was released on TWO x VHS tapes, as the movie was so long.
(And others too, inc Schindler's List and Gettysburg.)
Was this the case in the UK? Anyone remember this?