Stott's Ghostwalk and Robert Harris' Enigma, while Susanna Gregory wrote a series of novels set in 14th century Cambridge. Gwen Raverat, the granddaughter of Charles Darwin, talked about her late Victorian Cambridge childhood in her memoir Period Piece, and The Night Climbers of Cambridge is a book written by Noel Symington under the pseudonym "Whipplesnaith" about nocturnal climbing on the colleges and town buildings of Cambridge in the 1930s. Fictionalised versions of Cambridge appear in Philippa Pearce's Tom's Midnight Garden and Minnow on the Say, the city renamed as Castleford, and as the home of Tom Sharpe's fictional college in Porterhouse Blue. ITV TV series Granchester was partly filmed in Cambridge. Television News and television programmes are broadcast from the BBC East studio in Cambridge that is home to BBC Look East (West) which covers the city, Cambridgeshire, Northamptonshire, Bedfordshire, Milton Keynes (Buckinghamshire) and parts of Hertfordshire. ITV Anglia is another TV news which broadcasts from Norwich. Public services Cambridge is served by Cambridge University Hospitals NHS Foundation Trust, with several smaller medical centres in the city and a teaching hospital at Addenbrooke's. Located on the Cambridge Biomedical Campus, Addenbrooke's is one of the largest hospitals in the United Kingdom and is a designated regional trauma centre. The East of England Ambulance Service covers the city and has an ambulance station on Hills Road. The smaller Brookfields Hospital stands on Mill Road. Cambridgeshire Constabulary provides the city's policing; the main police station is at Parkside, adjacent to the city's fire station, operated by Cambridgeshire Fire and Rescue Service. Cambridge Water Company supplies water services to the city, while Anglian Water provides sewerage services. For the supply of electricity, Cambridge is part of the East of England region, for which the distribution network operator is UK Power Networks. The city has no power stations, though a five-metre wind turbine, part of a Cambridge Regional College development, can be seen in King's Hedges. The Cambridge Electric Supply Company had provided the city with electricity since the early twentieth century from Cambridge power station. Upon nationalisation of the electricity industry in 1948 ownership passed to the British Electricity Authority and later to the Central Electricity Generating Board. Electricity connections to the national grid rendered the small 7.26 megawatt (MW) coal fired power station redundant. It closed in 1965 and was subsequently demolished; in its final year of operation it delivered 2771 MWh of