Occidental refinery Canvey Island operate, and that the 1973 URL refinery planning permission should be allowed to stand. However, by this time the oil crises of 1973 and 1980 had affected the viability of the refinery and URL undertook not further work on the site. Shell Haven refinery Coryton refinery Kent refinery Occidental refinery Canvey Island The Occidental oil refinery was on Canvey Island, Essex, England. Located in the Thames Estuary, it was a partly-built, non-operational, six million tonne/year oil refinery planned and constructed by Occidental Refineries Limited in 1970–5 and demolished in 1996–7. It was also known as the Occidental Thames refinery. In
Canvey Island the present island, with a ditch being the current boundary, having the same far eastern points as the Canvey Point and Leighbeck Point marshes. Two Tree Island to the north is also recognisable, if halved in length. The third eastern island or mudflat could well be the Counus i.e. "council" Island where the Trinovantes, Cantiaci and the Catuvellauni counselled with the Iceni, shortly before staging Boudicca's rebellion against the Romans. If so Counus occupies an area from the Canvey Point Sand Bank until just before Shoeburyness, the eastern point of the relatively straight estuary so stretched the whole length of