Unifor picketers will be heading back to the office tomorrow on a work to rule campaign. After shutting down the SaskTel call centres this morning, the union says it will switch things up by having people head back to office. Union spokesman Chris MacDonald says the hope is the crown corporations see that the union is will to do a lot to make their point. MacDonald says there is currently no time line on how long the work to rule campaign will last and there is a possibility workers will be back on the picket lines again. Wages are the main sticking point.