I was sent to ( private but not posh ! ) school near Leeds-Bradford & ‘Lived’ at the airport most weekends in ‘73 / ‘74.
Northeast had a maintenance hanger & after a while of us asking to look at the aircraft , the techies were used to us and we were allowed in and onto the Viscounts.
Leeds - Bradford had a lot of Viscounts back then & we also knew that if Leeds United were playing away somewhere distant , we could look forward to a visit from one in Alidair markings.
I have been in lots of viscounts but never flew in one , sadly.
I DID used to fly home to Glasgow in a Dart powered HS-748 tho’.

I think BKS/Northeast/BA based up to three Viscount 806s at Leeds Bradford at their operating peak. Maybe just two by the mid to late 1970s as Air Anglia and Dan Air assumed some ex-BA routes. Aircraft based at Newcastle and Heathrow would also pass through on 'W' patterns.

Was the school Woodhouse Grove?

We must have been LBA regulars in the same period of time. I was up there weekends and school hols from August 74 until I left the area on starting work in the Civil Service in 1978.