Blue-chip benchmark supported by weaker pound but RS plunges 5.6%
Shares in London were slightly higher at midday on Tuesday, outperforming European and Asian market ahead of a likely lower open for New York, with UK large-cap stocks getting some benefit from a weaker pound.The FTSE 100 index was up 21.33 points, or 0.3%, at 7,792.32. The FTSE 250 was up 29.99 points, 0.2%, at 19,303.33, and the AIM All-Share was up 0.13 of a point at 808.34.The Cboe UK 100 was