Network Rail has made a revised offer on pay deals for 2015 to 2018 for workers in operations - including controllers - maintenance and bands 5-8 bargaining groups.
After three days of talks facilitated by Acas, Network Rail made the offer to RMT, TSSA and Unite trade unions, which will consider the terms before giving a formal response.
The revised offer includes a £500 non-consolidated lump sum for all staff in these groups - pro-rata for part-time staff - as the pay deal for 2015.
The rail operator also committed to making a consolidated inflation (RPI) percentage increase for 2016, 2017, and 2018, with a guarantee of no salary reduction if RPI falls below 0%.
It has also promised there will be no compulsory redundancies in 2015 or 2016.
Phil Hufton, managing director, Network Operations said: ‘We have had very constructive talks with our trades unions, and we appreciate their contribution to those discussions.
'We believe that the revised offer is the best one we could achieve through negotiations, which have now concluded. The trades unions negotiating team now need to take the offer away to share with their leaders and local area representatives with a view to reaching an agreement.
'We believe such an agreement would be good news for our people, for Network Rail, for our trades unions and, most importantly, for the people we are here to serve – our customers and passengers.’