The National Museum of Scotland is to be hit by a strike on Boxing Day.

The Public and Commercial Services union (PCS) has confirmed that visits to the National Museum of Scotland (NMS) in Edinburgh's Chambers Street will be hit by the strike.

The strike is part of the union's campaign to get museum management to reverse its decision to remove weekend working allowances for staff.

The strike marks a year in a long running dispute, following a break down in talks between the union and the museum.

Lynn Henderson, Scottish Secretary of the PCS, said: "We are extremely disappointed that talks have yet again broken down without agreement.

"Management had an opportunity to avoid these strikes but failed to offer a solution to a problem that they made by taking up to £3,000 a year from their lowest paid staff.

"Museum management have proved to be intransigent throughout the process and have proved that they are incapable of sorting this.

"Our members are now forced to take strike action again and have indicated that their resolve is as strong today as it was a year ago."

Picket lines will be in place from 11.30am to 12.30pm.

The Boxing Day opening times of the National Museum are supposed to be between midday and 5pm.

In January 2011, National Museums Scotland introduced revised contracts for new staff who are employed to work weekends; these new contracts do not include weekend working allowances.

Only around half of its staff who work weekends now receive a premium payment.