Joinder of plaintiffs.
Conditions under which several plaintiffs may join in one suit.
(a) Where a right to relief alleged to exist in each plaintiff arises out of the same act or transaction or series of acts or transactions; and
(b) where, if such persons brought separate suits, any common question of law or fact would arise.
Rule does not provide that any person who is necessary parties or proper party to a suit for whom it may be essential or advisable to join , must join as plaintiff to a suit .
Govind Prasad v Chandar Shekhar, (1887) 9 All 486 (DB).