EDINBURGH, May 21 (Reuters) British Prime Minister Theresa May's Conservatives have narrowed their lead over the opposition Labour party ahead of a June 8 election after both parties presented their programmes for government, a Survation poll for the Mail today showed. The Conservatives had a 46 per cent share of the vote while Labour had 34 per cent. An earlier Survation poll for the Good Morning Britain TV show published on Monday had the Conservatives on 48 percent and Labour on 30 per cent. The latest poll found the Liberal Democrats unchanged at 8 per cent and the United Kingdom Independence Party on 3 per cent. Survation interviewed 1,017 UK adults online from May 19 to May 20. REUTERS AKC 0408