A northern suburb of Portsmouth, Cosham lies within the city boundary but off Portsea Island, on the Hampshire mainland. Its name is Saxon in origin – the -ham suffix marks it as “Cossa’s homestead” – and it appears in the Domesday Book of 1086 alongside Drayton, Wymering and settlements on Portsea Island including Fratton and Copnor. Until the 1920s it remained a small, self-contained village surrounded by fields, with no indication of the suburban spread that would follow.
History and Heritage
Cosham carries an unusual historical footnote: King Æthelred the Unready was terminally ill here in 1015 when King Cnut of Denmark launched his invasion of the south coast. Over subsequent centuries the village expanded steadily, with suburban growth pushing east and west along the slopes of Portsdown Hill. The oldest surviving domestic buildings, Chalk Cottage of 1777 and Mile Stone Cottages of 1793, were demolished in the 1960s to make way for a car park, though the original milepost marking distances to London, Petersfield and Portsmouth still stands. St Philip’s Church in Highbury, built in 1938, is regarded by Simon Jenkins in England’s 1000 Best Parish Churches as the only parish church in Portsmouth worth visiting on architectural merit, cited for Ninian Comper’s interior work.
Transport and Commerce
Cosham has long been a pinch point for bus routes travelling in and out of Portsmouth, and Cosham railway station gives passengers frequent services to Brighton, London Waterloo, Bristol, Cardiff and Southampton across three train companies. Until 1935 the station was the southern terminus for city trams and trolleybuses, and northern trams on the Portsdown and Horndean Light Railway. The High Street functions as a local shopping centre. Cosham was once home to the UK headquarters of IBM UK Ltd, whose 1970s complex is now Lakeside Business Park.
Local Facilities
Queen Alexandra Hospital – widely known as QA – occupies the northern edge of Cosham at the foot of Portsdown Hill and covers south-east Hampshire and south-west West Sussex as its catchment area. The main campus of Highbury College is in the south-east of Cosham on the Highbury estate.