Charterhouse Street is a street on the north side of Smithfield in the City of London. The road forms part of the City’s boundary with the neighbouring London Boroughs of Islington and Camden. It connects Charterhouse Square and Holborn Circus, crossing Farringdon Road and running along a number of historical sites, including Smithfield Market. Charterhouse Street is also the home of a 31 MWe combined heat and power plant operated by Citigen (E.ON) and located within and beneath the former PLA cold store.