Protests have taken place at the M&S store in Glasgow and at other UK stores due to a pay dispute.
The Unite union staged the protests on Tuesday due to the retailer’s commercial relationship with Logistics Group Holdings Ltd and its subsidiaries, including Arrow XL.
About 350 of the union’s members employed by delivery company Arrow XL are involved in a pay dispute with the firm and re-balloting for further industrial action, having been on strike previously.