St Cheldon's Comprehensive School was a school in Upminster, London.

Around 2008, Coldfire Construction built a technology block used as a transducer to absorb energy from the Sun and destroy the Earth so the Slitheen could sell it off. The capacitors left a strange lingering smell and food went off. Around this time, Alan Jackson worked in IT at this block, noticing the smell. Sarah Jane Smith investigated this school as the same was happening at Park Vale Comprehensive School in September 2008. UNIT later cleaned up the transducer once the Slitheen left Earth. In 2008, Wendy was the headmistress of the school. (TV: Revenge of the Slitheen)

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