The FTSE 100 index rose 55.61 points to 6,389.45 and the domestic-focused FTSE 250 index improved almost 1% or 169.97 points to 19,752.32.
Second-tier risers included sandwich maker Greencore — up 3.6p to 122.4p — after its balance sheet was strengthened by a £90 million share placing and subscription at a 5.7% discount to last night’s price.
One of the stand-out performances of the session came from gift packaging and stationery business IG Design, which jumped 40p to 572p. The group said trading had been stronger than it expected during Covid-19 as families marked special occasions or embraced at-home activities such as sewing or crafting. First-half revenues jumped 41% for a 16% rise in adjusted profits.