When markets opened in Asia on Friday, the pound fell six per cent in two minutes, a plunge thought to have been caused by automatic trading systems responding to comments by French President Francois Hollande, who had called for tough Brexit negotiations.
Read more: Pound slumps six per cent in two minutes
Builders have been some of the biggest losers today; housebuilder Berkeley Group's share price was down 3.42 per cent at time of writing. Builders' merchants Travis Perkins' share price fell 2.93 per cent, making it one of the FTSE 100's biggest fallers.
Persimmon and Taylor Wimpey's share prices were down 2.4 per cent and 2.10 per cent respectively. Barratt Development's share price was down 1.65 per cent.
Marks and Spencer's share price fell 4.2 per cent in morning trading, but has now regained ground, and is down 0.03 per cent.
"Overall, however, continued sterling weakness has seen the FTSE 100 rise by 0.6 per cent, with the lower pound assisting many of the UK's stocks with international exposure."