A purpose-built chemical works, Beckton Products Works, was constructed in 1879. It was the largest tar and ammonia by-products works in the UK, possibly in the world. Besides millions of gallons of road tar, products included phenol, the cresols and xylenols, naphthalene, pyridine bases, creosote, benzene, toluene, xylene, solvent naphtha, ammonium sulphate and ammonia solution, sulphuric acid, picolines, quinoline, quinaldine, acenaphthene, anthracene and dicyclopentadiene. Since the Products works was dependent on by-products of gas manufacture it could not long survive the introduction of natural gas. The last train carrying chemical products, a load of pitch, left the works on 1 June 1970. The toxic spoil heaps from the works are known ironically as Beckton Alps. Originally covering an extensive area to the west of the works, they have been landscaped and much reduced in size. From 1989 to 2001 a dry ski slope, opened by Diana, Princess of Wales, was operated on the small remaining section (), though the nickname pre-dates this. The site is the highest point in Newham, and a Site of Borough Importance for Nature Conservation, Grade II. It is said to be the highest artificial hill in London. In 2003, a proposed £35m replacement for the site - the "SnowWorld" indoor centre - ran into financial problems. The site was acquired for development as a hotel in 2013. The A13/A117 road junction is also named Beckton Alps. During 2013 the sheets of corrugated iron situated on top of the former dry sky slope were painted in the colour of the Lithuanian national flag (the site is adjacent to London's largest Lithuanian supermarket) but later covered up with the St George Cross in retaliation. The Gasworks, Products Works and Alps were used as a location for TV and cinema filming on a number of occasions. In the 1960s comedy films and TV programmes, such as Michael Bentine’s "It's a Square World", were shot here. The mounds of chemical waste were used to portray mountaineering scenes. In 1975 the film "Brannigan" starring John Wayne used the location. The opening sequence of the 1981 James Bond movie "For Your Eyes Only" was filmed here. The scenes involved Roger Moore as James Bond attempting to regain control of a helicopter operated by remote control by his nemesis Ernst Stavro Blofeld.