A dispute at the cash-in-transit company Securicor, where services were disrupted by an unofficial one-day stoppage on Monday, has been referred to the Labour Relations Commission.
Staff at the Dublin branch of Securicor Cash Services took part in the dispute in protest at plans by the company to restructure its routes in Dublin.
This would have allowed the company to alter traditional cash transport "runs" and introduce what it considers to be more efficient routes and staffing in vehicles.
Under the proposals some routes previously operated by two-person crews would be serviced by one-person security vans.
It is understood the company has sought to introduce the measures to deal with changes in its customer base.
The work stoppage only affected the cash-in-transit services operated by the company in Dublin. Its services in other branches were unaffected.
A spokesman for Securicor Cash Services said last night that the company was operating fully within national agreements that had been negotiated with Siptu.
A spokesman for Siptu was unavailable for comment last night.
An agreement between the company and Siptu in May 2003 allowed for the operation of one-person security vehicles in some cases.
Around 10-15 per cent of business is currently operated by one-person vehicles.
It is understood that Siptu officials met with staff at Securicor Cash Services in Dublin on Tuesday.
Following the meeting the issues at the centre of the dispute were referred to the Labour Relations Commission.
Last year services at some automatic teller machines (ATMs) were disrupted by a dispute at another cash-transit company Brinks Allied.
That dispute centred on plans to introduce new work practices. Services at some ATMs in locations other than banks and retail outlets were disrupted in the summer of last year.