Elbit is Israel's largest arms manufacturer, providing over 80% of Israel's military drones which are used to patrol and regularly bomb Gaza and the rest of Palestine. Elbit also produces illegal weapons like white phosphorous, provides surveillance drones against refugees, as well as the sinister simulation technology such as that produced at the Oldham factory, which teaches pilots how to bomb targets by using simulations from the Israeli military’s shelling of Gaza. Elbit Systems UK has established an extensive presence in the UK over the last 16 years opening 10 sites in England and Wales, including four weapons factories. Ferranti Technologies in Oldham was bought by Elbit Systems in 2007 for £15 million. Weapons parts produced by Elbit Ferranti include intelligence gathering systems for drones.