The boss of National Express East Anglia has apologised to passengers after the Norwich-London mainline was hit by 'last minute' engineering works.

Services were affected by works last weekend and a rail replacement service will also be in place on Sunday.

Andrew Chivers, managing director of the rail company, apologised after 'late notification' by Network Rail meant that the service changes were not correctly displayed on the National Express website or those of other information and ticket providers.

On Sunday, buses will replace trains between Ipswich and Diss until 3pm and replacement buses will operate between Ipswich and Stowmarket after 3pm. The works will add up to an hour onto journey times. Passengers travelling between London and Norwich will also be able to use their National Express East Anglia tickets on First Capital Connect services between Ely and Cambridge and London Kings Cross.

A spokesman for Network Rail said the project involved the replacement of a rail junction north of Ipswich, which was postponed in February, and the rail company was notified of the works three or four weeks ago.