Britain's top share index dropped for a second trading day on Monday, with property shares falling after a rise in gilt yields that made stocks paying a high dividend less attractive compared to the lower risk government debt. The FTSE 350 Real Estate Investment & Services index fell 1 percent, with companies such as Land Securities, British Land and Barratt Development down 1.3 to 2.1 percent. The blue-chip FTSE 100 index was down 0.5 percent at 6,873.80 points by 0919 GMT after falling 0.7 percent on Friday, moving further away from a record high of 6,974.26 points set in the previous week. The UK mining index fell 0.5 percent, while the oil and gas index fell 1.1 percent, tracking a slide in Brent crude oil prices which fell towards $59 a barrel.