DorneyLake123
Hi Dave, it really depends on how it's signposted. 

St Martins school is addressed at "The Derwent Campus", perhaps this could be the name of an amenity=school or landuse=education way and the 2 schools mapped separately as nodes of buildings?

Presently St Martins isn't mapped at all, I thought it might be in a house on Bracknell Drive before seeing this note.