The group's order book has fallen by about 5% since the half year but remains in excess of £1bn, helped by major international projects and public sector transport and infrastructure work particularly in Sweden and the UK.

"In this period of economic uncertainty, WSP is in good shape and we believe our strategy, developed over the last four years, has positioned the Group to both address and respond to the challenging market in the period ahead," said the group.

"Our market position, substantial order book, flexible business model and experienced global management ensure the Board continues to view the future with confidence," it added.