FTSE 100 Index, the British benchmark stock market gauge, Monday decreased by 0.76 percent, or 50.10 points, to close at 6,535.68 points.
The London stock index fell on Monday after the Greek public's rejection of creditors' bailout proposals.
The Greek people on Sunday gave an overwhelming "No" in the referendum on a rescue package from creditors, dramatically increasing the chance for the country to crash out of the eurozone.
Greek Finance Minister Yanis Varoufakis resigned after the country's decisive rejection of the eurozone's terms.
Rolls-Royce Holdings led the top losers of the blue chips with a share price drop of 6.30 percent, followed by RSchroders (3.56 percent), Royal Bank of Scotland Group (3.56 percent), TUI AG Reg Shs (3.14 percent) and Weir Group (3.08 percent).
Meanwhile, Marks & Spencer Group' share price increased by 1.58 percent, topped the gainers of the blue chips. Reckitt Benckiser Group, Royal Mail, SSE and Barratt Developments increased by 1.14 percent, 1.09 percent, 1.03 percent and 1.02 percent respectively.