Coldfire Construction

Coldfire Construction was a construction company used by the Slitheen. They built reactors across Earth which would unite and black out the Sun. They built several science buildings at various London schools such as Park Vale Comprehensive School in Ealing and St. Cheldon's Comprehensive School in Upminster.

The secretary Janine had been killed by a member of the Slitheen. Sarah Jane Smith, Luke Smith, Maria Jackson and Clyde Langer stopped them, though. (SJA: Revenge of the Slitheen)