reduce leakage, improve drainage and install new lifts, CCTV, communication facilities and signage. Completion was planned for March 2011 but this slipped to September 2011. The tunnel was supposed to be accessible throughout most of the renovations, but it closed completely in February 2011. Stair use was soon regained but lifts remained out of service until early 2012, and remained subject to occasional brief closures during 2012. In October 2012 Greenwich Council acknowledged that the upgrade work had not been completed on time and had run over budget. The work was finally completed and included new customer-operated lifts with surface level availability signs, CCTV coverage, upgraded lighting and renewal or replacement of vital structural components. The lifts were out of action for a long period in 2021-22 which Greenwich Council attributed to an international supply chain problem affecting the supply of spare parts. Location The tunnel links Greenwich town centre on the south bank of the Thames. Its entrance is close to the prow of the restored clipper Cutty Sark. with parts of Docklands including Canary Wharf on the north bank. The tunnel's northern entrance is within Island Gardens, a park on the southern tip of the Isle of Dogs, with views across the river to the former Greenwich Hospital, the Queen's House and the Royal Greenwich Observatory. Coordinates Greenwich entrance: Tower Hamlets entrance: Usage A notice at the tunnel entrance states that the tunnel is private property (the Royal Borough of Greenwich manages the Greenwich and Woolwich foot tunnels on joint behalf of two other partners, the London Borough of Tower Hamlets and the London Borough of Newham) and not a public right of way. Ordnance Survey maps do not show a right of way on the route of the tunnel. The tunnel is also part of the UK's National Cycle Route 1 linking Inverness and Dover. A National Trail, the Thames Path, uses the tunnel to rejoin the southbound part of the path. A 2016 survey showed that around 4,000 people use the tunnel each day. The 'Friends of Greenwich and Woolwich foot tunnels' (FOGWOFT) was established in September 2013. Following encouragement from FOGWOFT and information from the Institution of Civil Engineers, on 5 July 2016 an interpretative plaque was unveiled near the tunnel's Greenwich entrance by the deputy leader of Greenwich council. Cycling Local bylaws require cyclists to dismount and push their bikes through the tunnel, although