Basingstoke Press Ltd v Clarke [2007] IRLR 588 (EAT)
When calculating the 28 days which must elapse under the statutory grievance procedure between submitting a grievance and making a tribunal claim, 28 clear days must elapse between the date of the grievance and the date of submission: “if you put a grievance in on a Monday you must wait until the Tuesday four weeks later—in other words, 28 days plus a day—before presenting a claim”.