Dawes Cycles Ltd v Sedgley, EAT Case EAT/849/97 unreported (judgment on 12th March 1998).
there is no rule of law to the effect that if an unfairly dismissed employee finds a new job the original employer is automatically exonerated from financial responsibility when the new job itself comes to an end.
Whether the "chain of causation" has been broken by the new job will depend on the facts but the EAT took the opportunity to give guidance as to factors which it would be proper for an employment tribunal to take into account in a typical case.
For main notes see Unfair dismissal/mitigation of loss .