- Filtration and environmental technologies group Porvair said it expected to post annual earnings ahead of its expectations, while revenue would grow by around 10%.

Underlying revenue growth for the year through November was expected to around 12%, with 18% growth in the aerospace and industrial division, 12% growth in the laboratory division and 8% growth in the metal melt quality division.

Provair also said it expected to book an exceptional tax credit of £0.8m relating to the impact of tax rate changes in the US.

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