The biggest risers on the FTSE 100 were Imperial Brands, up 62.0p at 3,139.0p, Games Workshop, up 350.0p at 18,000.0p, Metlen Energy & Metals, up 0.6p at 34.0p, Scottish Mortgage Investment Trust, up 17.5p at 1,285.5p and Berkeley Group, up 42.0p at 3,210.0p.