There does seem to be a few companies doing 'retrofits' that con these places like schools into replacing all their decent lighting sadly.One of the most annoying replacements is seeing quality T8 and T5 modulars being changed for those awful panels, that and the cheap excuses for weatherpacks we see now.
Surprised to hear of a few 8ft still about, most of them that I knew of locally have been replaced with LED battens or even 6ft T8 or 5ft T5 before LED kicked off. Guessing you have a good stock of burner lamps to keep that school going Kev?