30 It follows, in my opinion, that the chamber judge approached the exercise of discretion whether to join MMI by reference to a wrong principle. His Honour thought that the appellant was barred by the Limitation Act from commencing proceedings against MMI so that "special or peculiar" circumstances needed to be shown before an order joining it to the action could be made. For the reasons I have expressed section 11 of the Limitation Act does not apply to the statutory obligation to include an insurer as a defendant in an action for damages for personal injury caused by, through or in connection with a motor vehicle. It follows that the discretion should have been exercised by reference to the principles applicable where it is sought to add a defendant to an action without the complication of the expiration of a limitation period. Much of the argument upon the appeal was taken up with the question whether, on the assumption that the insurer could rely on section 11 of the Limitation Act, the circumstances were sufficiently special to justify the joinder. The knowledge of the insurer of the claim at material times, the absence of prejudice to it and its limited function as a party, make this a distinctly arguable proposition for the appellant. However it is unnecessary to express a view as to whether the appeal should be upheld on that alternative assumption.