I don't see schools as being excluded from the scope of BS7671 and its 'domestic and similar situations' - staff room?
The reference to 411.3.3. (a) & (b) does not necessarily apply to schools - socket-outlets are not always supervised (in fact in my experience very rarely) in schools.
While there may be a case to suggest that many cables will effectively be surface mounted - many may not (below 50mm) and therefore may require additional protection.
Discuss