in 2001 as a complex of retail outlets, clubs, pubs, and a shopping centre known as Gunwharf Quays. Construction of the Spinnaker Tower, sponsored by the National Lottery, began at Gunwharf Quays in 2003. The Tricorn Centre, called "the ugliest building in the UK" by the BBC, was demolished in late 2004 after years of debate over the expense of demolition and whether it was worth preserving as an example of 1960s brutalist architecture. Designed by Owen Luder as part of a project to "revitalise" Portsmouth in the 1960s, it consisted of a shopping centre, market, nightclubs, and a multistorey car park. Portsmouth celebrated the 200th anniversary of the Battle of Trafalgar in 2005, with Queen Elizabeth II present at a fleet review and a mock battle. The naval base is home to two-thirds of Britain's surface fleet. Geography Portsmouth is by road from central London, west of Brighton, and east of Southampton. It is located primarily on Portsea Island and is the United Kingdom's only island city, although the city has expanded to the mainland. Gosport is a borough to the west. Portsea Island is separated from the mainland by Portsbridge Creek, which is crossed by three road bridges (the M275 motorway, the A3 road, and the A2030 road), a railway bridge, and two footbridges. Portsea Island, part of the Hampshire Basin, is low-lying; most of the island is less than above sea level. The island's highest natural elevation is the Kingston Cross road junction, at above ordinary spring tide. Old Portsmouth, the original town, is in the south-west part of the island and includes Portsmouth Point (nicknamed Spice Island). The main channel entering Portsmouth Harbour, west of the island, passes between Old Portsmouth and Gosport. Portsmouth Harbour has a series of lakes, including Fountain Lake (near the commercial port), Portchester Lake (south central), Paulsgrove Lake (north), Brick Kiln Lake and Tipner (east), and Bombketch and Spider Lakes (west). Further northwest, around Portchester, are Wicor, Cams, and Great Cams Lakes. The large tidal inlet of Langstone Harbour is east of the island. The Farlington Marshes, in the north off the coast of Farlington, is a grazing marsh and saline lagoon. One of the oldest local reserves in the county, built from reclaimed land in 1771, it provides a habitat for migratory wildfowl and waders. South of Portsmouth are Spithead, the Solent, and the Isle of Wight. Its southern coast