(Reuters) - UK shares climbed on Tuesday as hopes of fresh government stimulus to blunt the economic impact of the coronavirus crisis added to optimism about a faster recovery with the easing of a nationwide lockdown.The blue-chip FTSE 100 was up 0.7% as a report said finance minister Rishi Sunak was considering national insurance holidays for companies as part of a stimulus package to be announced in July.The mid-cap FTSE 250 added 0.8%, hitting its highest in nearly three months, although a..