Britain's top equity index slipped lower on Monday, with traders citing plans by the UK's opposition Labour Party for rent controls as causing a pullback in house building and property stocks, Reuters reported. House builders such as Taylor Wimpey and Barratt Development were among the worst performers on the blue-chip FTSE 100 index, which was down 0.4 percent at 7,044.47 points. The FTSE remained near record highs of 7,119.35 points reached earlier this month, but some traders said uncertainty ahead of the election would prevent the UK stock market making major gains in the near term.