ELECTRICAL union Amicus is ready to take Alfred McAlpine to the Joint Industry Board's disciplinary council in a dispute over wages at Gatwick airport and a host of other sites.
Under the JIB agreement, which covers the electrical contracting industry, pay rates for London technicians were due to rise from £12.18 to £12.84 an hour on January 10.
The electrical workers were transferred to Alfred McAlpine's facilities management business under a BAA framework deal for electrical maintenance from previous incumbent Hills Electrical.
But, according to Amicus, Alfred McAlpine has been late in implementing the new JIB rates. Around 70 workers are understood to be stuck on last year's salary level.
Amicus official Neil Willoughby said: 'This affects Gatwick and a number of other sites as well.The new JIB pay rates came into force over a month ago but our members are still getting the old rates.
'We haven't had anything in writing yet and we're considering going to the JIB board if this isn't sorted out soon.'
Alfred McAlpine already works for BAA at Glasgow and Edinburgh airports but is locked in negotiations with BAA over work on more sites.
A spokesman said that any workers who had lost out would receive extra pay backdated when the negotiations with BAA were complete.
He said: 'We discovered that these employees are paid well in excess of the JIB rate, therefore on 10 January we decided not to change their pay rate at that time as they were already receiving over and above the stated rate.
'Within the proposed contract we are currently undertaking a competency review to determine any appropriate pay rate increases for all employees, including those in the JIB.
'Some of the employees are being paid at various different rates for the same, or similar, jobs and we wanted to apply a logical approach to this to ensure there is some kind of equity.'