Balfour Beatty rail workers threaten strike action after ‘empty’ pay offer The head of the TSSA union said strike action among Balfour Beatty workers on a £1.5bn Network Rail contract is “a certainty” – unless the contractor increases its offer of a pay rise. Balfour employees on the central rail system alliance – which covers development, design and delivery of track renewals and crossings, as well as associated infrastructure works across the London North West, London North East and East Midland routes – have been offered a 2 per cent pay rise from April this year, but nothing in relation to the previous year.