Mr Trump described North Sea oil as 'so highly taxed that no developer, no oil company can go there'. He said: 'They've given up their powerful edge, a lot of the countries that we're talking about, in oil and gas, such as essentially closing the great North Sea oil. 'Aberdeen was the oil capital of Europe and there's tremendous oil that hasn't been found in the North Sea – tremendous oil.' 'They have tremendous oil left and, more importantly, they have tremendous oil that hasn't even been found yet. 'North Sea oil, North Sea'.'