steam engine decommissioned, in 1953, it is this engine on which the restoration activity has been concentrated. After some fifteen years of effort the engine is now working again and is run on the open days organised by the Trust. When the buildings were abandoned, the pumps and culverts and all the subterranean areas below the Beam Engine House were filled with sand to reduce the risks from methane. This has meant that some 100 tons of this sand has had to be excavated from around and underneath the pumps before there was any hope of moving the beam and flywheel. Further, there was a considerable ingress of rain water which resulted in serious rusting of the engine parts. The station contains the four original pumping engines, which are thought to be the largest remaining rotative beam engines in the world, with 52-ton flywheels and 47-ton beams. Although the engines are original, they are not in their original 1864 configuration, as all four were converted from single-cylinder to triple-expansion operation in 1901 and 1902. Prince Consort was returned to steam in 2003 and now runs on Trust Open Days. The other engines are not in working order, although work has begun on the restoration of Victoria. The original boilers did not survive and Prince Consort is now steamed by a small 'off the shelf' boiler. This boiler has nowhere near the steam capacity of the originals, but this is not a problem as the engine no longer operates under load. Museum Having received over £2 million in initial funding, including, in 2008, £1.5 million from the Heritage Lottery Fund, £150,000 from English Heritage and £700,000 in match funding from the Department for Communities and Local Government, work began at the site to build an access road, protect the buildings and to develop a museum. Financial and other support was also provided by Thames Water, Tilfen Land, the London Borough of Bexley and the City Bridge Trust. A further £1.5 million in funding from the Heritage Lottery Fund was secured in April 2015, the 150th anniversary of Crossness's official opening. This was to help fund a museum exhibition focused on the "Great Stink" of 1858 and the role of Crossness in improving London's sewerage system. In popular culture The 2003 BBC Series Seven Wonders of the Industrial World: The Sewer King episode featured a segment filmed in the pumping station. The