If it was suspected that he misled parliament, couldn't that call for some sort of investigation? I'd be looking for -
-What instructions were given to the printers and when they started printing.
-How many hotel rooms they booked that weekend compared to the previous few weekends.
-movements of managers.
-What instructions were given to couriers and when they started asking their staff to work the weekend.
Any other suggestions? If there is an avenue here it may be explored.