Are you fully complient ?
Asbestos was  used as a building material  from the 1950s through to the mid 1980s. It was used for a variety of purposes,typically fireproofing and insulation.
The use of asbestos in building construction was banned in 1999, so any school premises that were built before 2000 may contain asbestos.

“The employer must provide adequate information, instruction and training for those employees most likely to disturb asbestos eg school caretakers.They must also […]