By Khushi Singh and Shubham Batra (Reuters) -The UK’s FTSE 100 fell on Monday, hurt by a sell-off in luxury and bank stocks, while lacklustre corporate earnings forecasts weighed on the FTSE 250 shares. The blue-chip FTSE 100 slid 0.4%, while the midcap FTSE 250 index was flat at the close. Personal goods index fell 4.4%, with Burberry extending losses with a 5.7% slump, after three brokerages cut the target price on the luxury retailer after it warned of a worsening slowdown in demand for luxury goods last week. “Today’s biggest fallers on the FTSE100 are lower due to broker downgrades. Burbe…