- The FTSE 100 started Friday on the back foot, down 0.3% to 7,583.96, as mining stocks fell on worries over slowing growth in the world economy.

Aviation services firm John Menzies guided for full year earnings to be at best flat year-on-year after a weaker than expected first half performance. Its shares fell 14.1%.

In a first half trading update specialist building materials supplier SIG said it expected to hit full year expectations but said it 'will continue to monitor how trading conditions develop'. Investors took fright as the stock declined 5.9%.

The company reported a 3.8% like-for-like decline in revenue in the first six months of its financial year. This encompassed a 12.7% like-for-like decline in the UK and a 3.3% advance in Mainland Europe.

Marine services provider James Fisher and Sons announced the appointment of Eoghan O'Lionaird as CEO, dipping 0.6% in response.

Miner Ferrexpo fell 2.9% as it said it expected first-half sales to increase by approximately 4% amid 'stronger' iron ore prices and premiums for iron ore pellets.

Dechra advanced 0.4% as it acquired a further 15% stake in Medical Ethics for a total of about AUD$13.5m from the current shareholders, taking its total holdings in the company to 48%.

Westminster Group, a supplier of managed services and technology-based security solutions worldwide, has entered into a strategic alliance agreement with the Gulf Aviation Academy of Bahrain (GAA) for the provision of aviation and other specialised training services. Its shares were up 12.3% in response.

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