(1) This rule applies to a change in a statement of case after the end of a relevant limitation period.
(2) The court may allow an amendment the effect of which will be to add or substitute a new claim but only if the new claim arises out of the same or substantially the same facts as a claim in respect of which the party wishing to change the statement of case has already claimed a remedy in the proceedings.
(3) The court may allow an amendment to correct a mistake as to the name of a party but only where the mistake was —
(a) genuine; and
(b) not one which would in all the circumstances cause reasonable doubt as to the identity of the party in question.
(4) The court may allow an amendment to alter the capacity in which a party claims.
• Rule 19.4 specifies the circumstances in which the court may allow a new party to be added or substituted after the end of a relevant limitation period.