UK shares drifted further on Tuesday from last week's record high, Reuters reported. The blue chip FTSE 100 inched 0.1 percent lower to 7,517.73 points by 0924 GMT, while the more domestically-exposed mid cap index dropped 0.8 percent to a two-week low. Large caps came under pressure for a second session in a row as sterling continued its climb to hit a 12-day high as investors bet on a win for the ruling Conservative party in the election. A stronger pound tends to weigh on the FTSE 100's more internationally-facing constituents. Medical technology firm ConvaTec was the biggest individual faller, down nearly 5 percent after two investors sold a higher stake via a placing. Luxury goods firm Burberry was also down 2.7 percent after HSBC cut its rating on the stock to "reduce" from "hold", citing a lack of visibility on the top line. Miners also added pressure to the index, with names such as Antofagasta, Anglo American and BHP Billiton declining between 0.8 percent to 1.7 percent as the price of copper eased.