At my School I'm Strategic ICT Manager, I manage the Network Manager, do the buying, control the Whole School ICT budget etc, as well as everything from hands on repairs, toners, passwords through to strategic planning and implementation etc.
BUT I also sing in the choir, play in the Big Band, Brass Group and Orchestra, am the Musical Director for the shows, look after Theatre lights and sound and many other bits and bats.
So the school decided NOT to TUPE me, I'll stay in their employment. It's YOUR OWN School in the majority of cases that decides who gets TUPE'd, and whilst they know I'll no longer have admin rights I'll still be a useful part of the IT team in negotiation with Northgate.
It's not as bad as people think if you talk to your Head well in advance.