A busy road in the Poyle industrial estate has been closed this afternoon after following reports of an 'unknown substance'.

Firefighters from Slough and Langley were called out to Willow Road, in Colnbrook and Poyle, soon after 2pm.

Specialist crews from Oxfordshire also attended as part of the multi-agency response.

A cordon was put in place but the substance was identified as harmless.

Crews were on the scene until 5.30pm.