Limitation of Actions Act 1936

All actions for rent reserved by any lease by deed and all actions of covenant or debt upon any bond or other specialty or upon any judgment or recognisance shall be commenced and sued within fifteen years next after the cause of action accrued or the recovery of the judgment and not after: Provided that if any acknowledgment has been made either by writing signed by the party liable by virtue of the deed bond specialty judgment or recognisance or his agent or by part payment or part satisfaction of any principal or interest being then due thereon, any person entitled to any such action may bring an action for the money remaining unpaid and so acknowledged to be due within fifteen years after that acknowledgment by writing or part payment or part satisfaction.