Alistair20000
Very well known Exeweb poster
Having consulted mumsnet where there was a similar debate to that on these boards, I deduce that SBP was used on Blue Peter to cover all that sticky stuff referred to in the Exeweb dialogue, Fablon and Sellotape. A generic term.The good people of exeweb told me that sellotape and sticky back plastic were not the same thing.
Watch the drama unfold here.
In addition I definitely recall Val with some Sellotape and calling it SBP as some thingummy was being constructed.