Amec Group is suing Thames Water Utilities for £1.1m, after the water company refused to pay it for construction and maintenance work

A High Court writ issued by Amec said a dispute arose between the parties over the valuation of the contractor’s work in October 2009.

Amec referred the dispute to an adjudicator, who ruled in December that it was due £960,000.

Amec claims Thames Water has refused to pay the sums awarded, and is seeking enforcement of the adjudicator’s decision.