- Filtration and environmental technologies group Porvair said it had grown revenue in the first half by 8%, while profits were expected to rise in line with its expectations.

Underlying revenue, which was measured on a constant currency basis and excluded contributions from large projects, rose 13%, it said.

Net cash at 31 May was close to £2m after investing around £7m in capital expenditure and acquisitions.

A one-off non-cash reduction in deferred tax liabilities following the December 2017 changes in US tax rates would benefit reported earnings per share 2 pence.

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