- UK stocks edged lower at the open on Tuesday as investors mulled Prime Minister Theresa May's chances of survival amid a week of major political upheaval over Brexit.

At 0859, the benchmark FTSE 100 index was down 7.19 points, or 0.1%, at 7.680.80.

Supermarket giant Tesco shed 3.7% after announcing that the head of its UK and Ireland business, Charles Wilson, would step down from the role while he dealt with a cancer diagnosis.

Wilson, who Tesco said had responded very well to treatment, would continue to lead the integration of recently-acquired wholesaler Booker.

Online grocery retailer Ocado Group fell 4.9% after investments in its logistics and technology platform offset a rise in revenue to send it into the red.

Broking group TP ICAP tumbled 31% as it downgraded its annual earnings guidance, blaming a raft of costs, and said chief executive officer John Phizackerley had left.

IT services provider Softcat rallied 7.2% after it forecast full-year adjusted operating profit to be 'materially ahead' of its prior expectations.

Kier Group gained 1.4% on news that it won an extension to UK road contracts, while stating that profits would meet expectations amid a recovery in construction volumes.

Recruitment consultancy Robert Walters said its gross profit climbed by 16% in the second quarter on-year, amid growth in both the UK and abroad. Its shares gained 0.4%.

Premier Asset Management Group lifted its third-quarter dividend after its asset under management grew by 17%. The shares rose 0.4%. Story provided by