Complex sentence: In the 1950's he designed two London primary schools from prefabricated pre-cast concrete with brick infill for the London County Council, one of which in Putney was considerably damaged by a rogue developer in 2007.
Split into simpler sentences: In the 1950's he designed two London primary schools from prefabricated pre-cast concrete with brick infill for the London County Council. One of which in Putney was considerably damaged by a rogue developer in 2007.