LONDON: It took Ed Roberts over a year to find a senior scientist to work at his cancer research laboratory in Scotland, a delay he blames on high UK visa costs that made it harder to attract international workers. Scientific academy the Royal Society says UK immigration fees for foreign workers are up to 17 times higher than the average for other leading science nations, inflated in part by an upfront charge to access Britain's state-run health service. The Society, scientists, consultants and