Coke ovens used in the production of chemicals at Billingham were replaced in 1962 by new plants using the steam naphtha process, which enabled the use of crude oil as feedstock for the process known as "cracking". This proved to be a much cheaper way to produce ethylene , aromatics , petroleum derivatives and other chemicals such as ammonia on Teesside. From 1964 to 1969 four great oil refineries were erected at the mouth of the Tees, two by Phillips Petroleum and one each by ICI and Shell. Their main purpose was to supply the Billingham chemical industry.  A 138-mile (222 km) pipeline was built in 1968 linking chemical works on Teesside with chemical plants at Runcorn for the transport of ethylene.  Today the remaining oil refinery is operated by ConocoPhillips and two biorefineries, producing biodiesel and bioethanol for transport fuels, are operated by Ensus and Harvest Energy. SABIC operate the ethylene cracker and the aromatics plants, while the ammonia and fertiliser works are operated by CF Fertilisers.
This doesn't prove anything, of course - and WikiLeaks only moved its main server to Sweden two years ago, after the Julius Baer Bank tried to close down the website. Even so, I email Eva Gabrielsson, Larsson's widow, to ask if the two of them ever met Assange - explaining that he helped research a remarkable 1997 book, Underground , about the exploits of an extraordinary group of young Melbourne hackers, written by the Melbourne academic Suelette Dreyfus. The hackers all had monikers in the book: Assange is said to be the character Mendax. Assange convinced Dreyfus to release the book online, and according to one source I spoke to, there was great interest in the book in Sweden - and in China.