He may well have simply bunkered down to cobble together a new one (Jedi tradition required heavy meditation, so a lightsaber's construction could take days; Anakin could create a stopgap solution within a few hours, given the parts) but then the Force rang out with the cries of another Jedi in trouble. Master Obi-Wan. The woman that Anakin had come to think of as his grandfather was in trouble, so Anakin extricated himself from the French group and made his way to England.