Hemel Hempstead MP Mike Penning has confirmed that he will be at a meeting between Old Town traders and chiefs behind the High Street revamp.
Business owners said they were surprised that the MP was not at a meeting between the parties on Thursday morning.
But Mr Penning, who had championed plans to improve the High Street for traders, had only been told about the summit at the last minute and was tied up in Westminster.
He told the Gazette today that he will be at a follow up meeting between business owners, Herts County Council, Dacorum Borough Council and Jackson Civil Engineering on Monday morning from 8.30am at the Old Town Hall.
Officials are expected to present alternative options to traders that will avoid the need to close the road for seven weeks, which some say will be so damaging it will force them to shut their businesses for good.
The works, which include creating a one-way system for traffic, have over-run due to delays with the delivery of materials from China and the discovery of tombs under St Mary’s Close car park.
It means traders are facing disruption in the run up to Christmas, which should be their busiest time.