STAFF working to restore the M4 Brynglas Tunnels received a special visit from Economy Secretary Ken Skates last night, as overnight works on the site progress.

The £40million works, carried out by contractor Costain, aim to improve the site which was damaged by fire following a crash in 2011.

Starting in June this year, works involve replacing tunnel lining, updating signage, restoring the fire-damaged roof resin and installing new electrical systems.

While the maintenance has resulted in the tunnels being closed off and diversions being put in place, contractors have sought to minimise disruption to drivers by working overnight on selected days.

As the westbound side of the tunnel enters its final stages, cabinet secretary for economy and infrastructure, Ken Skates, was invited to take a tour of the site.

Describing it as a “key transport artery” running through South Wales, he said that it is important the tunnels don't become a “redundant or defunct highway”.

“It’s absolutely essential that we maintain what we consider to be major assets for the country,” he said.

“This work is needed in terms of the actual safety. It is needed because all major roads which we’re responsible for have to be kept to a highly maintained status."

“We need to keep traffic moving as well along the M4 and for that reason it’s important that this work is taking place at night at the lowest volumes of traffic and therefore the least disturbance," he added.

Newport West AM, Jayne Bryant - who also attended the Brynglas tunnels tour - added that it’s “really important to have the opportunity to see the necessary work being undertaken”.

“I know from constituents and residents that there has been some disruption in terms of traffic and have been working with councillors, Costain and residents to make sure this is addressed,” she said.

“I think today has given an insight into how much work is going on but they have assured us to be patient while this work is being undertaken."

Tunnel refurbishment and routine maintenance works are expected to continue until February 2018.

More information on the delays and closure timetable:

South Wales Argus: