Rising miners helped boost the FTSE 100 on a quiet day for corporate news, pushing the blue-chip index 0.3% higher to 7,499 around midday.

Fresnillo strengthened 2.9% to 843.6p and Evraz gained 1.8% to 588.5p.

Brent crude oil was stable at $84.87 per barrel.

Growth in the UK service sector dipped from 54.3 in August to 53.9 in September according to Markit's Purchasing Managers' Index. A figure over 50 implies growth and one under 50 suggests contraction.

Fancy car maker Aston Martin finally made its much anticipated debut on the London stock market. Its shares fell from the offer price of £19 to £17.91.

MID AND LARGE CAP RISERS AND FALLERS

A poor performance in mainland Europe and Asia dragged on supermarket giant Tesco's underlying operating profits, which rose 24.4% to £933m. Investors marked the stock 8.2% lower to 215.9p as profit growth was lower than analysts' expectations.

Exhibitions business ITE warned investors over the effects of volatile currency movements on its annual profits due to exposure to embattled emerging markets, causing the shares to retreat 2.9% to 73p.

B2B information company Euromoney announced it would sell mining investment conference Mining Indaba to ITE for £30.1m, helping the stock advance 1% to £13.54.

SMALL CAP RISERS AND FALLERS

Shares in tiles specialist Topps Tiles gained 11.6% to 70p after revealing adjusted pre-tax profit in the year to 29 September are expected to be at the top end of expectations.