Strike action will continue at the Sellafield site in West Cumbria from Monday.
Staff employed by subcontractors at the nuclear site will continue industrial action from Monday January 19.
Members of the Unite union began the industrial action in September.
They are demanding site-specific allowances, which they claim are paid at other nuclear sites, from their companies.
The industrial action is covered by conditions from Cumbria police under the Public Order Act.
Marches must not start before 7am and conclude by 10am.
Any marches from Calder Bridge to North Gate must start after the turn-off to Sella Park Hotel so that their business access can be maintained.
Previously, marches had been taking up to six hours as striking workers walked really slowly – dubbed the Sellafield shuffle.
There was no industrial action from December 22 to January 2.
Access to the Yottenfews car parks has returned to normal arrangements. Before 9am, vehicles should either display a valid YOVA/SOVA or have more than one occupant.
Sellafield Ltd is not involved in the dispute.
Previously, a spokesman told Cumbria Crack: “The industrial action taking place at Sellafield is the result of a pay dispute between some Unite union members and their employers.
“As the people involved are not employed by Sellafield Ltd this is not a dispute that we can resolve.
“Our priority, as always, is to maintain the safety and security of the Sellafield site.
“We have provided guidance to our employees who may be impacted in travelling to the site during the action.
“We will also continue to support Cumbria police as they work to minimise the impact of the action on the local road network.”
Unite has previously said the companies involved in the dispute were Altrad Services; Amentum Clean Energy; Amentum Enterprise Asset Solutions; AVRS Systems; Balfour Beatty; Careys; DSD; Design Grid; Enigma; Erith; ES Steel Ltd; Flannery; Impwood; Kaefer; Keltbray; Kier; LEL Nuclear; Mammoet; Meldrum; Mitie FM Ltd; Mitie Ltd; Morgan Sindall; NG Bailey; NRL; Nuvia; PC Richardson; PPS Electrical; Rhodar; Shepley; Sir Robert McAlpine; VGC Group; William King; G&M Lawson Ltd; Athena; Stobbarts Ltd and FB Taylor (Cable Contractors) Ltd.
