Should any default be made in paying any sum due to us or should a Receiving Order or Winding up Order be made against the customer, then in any such case we may, at our option excercisable at any time, either suspend all further deliveries until the default be made good or cancel the order in so far as any further work remains to be done, by written notice to the customer of our intention so to do, but in either case without incurring any liability and without prejudice to the right to recover any payment due the customer shall indemnify us for any loss sustained in consequence of the non-completion of the contract.