The usual mode in England of enforcing liability under a guarantee is by action in the High Court or a County Court. It is also permissible for the creditor to obtain redress by means of a set-off or counterclaim, in an action brought against him by the surety. On the other hand, the surety may now, in any court in which the action on the guarantee is pending, avail himself of any set-off which may exist between the principal debtor and the creditor. Moreover, if one of several sureties for the same debt is sued by the creditor or his guarantee, he can, by means of a third-party complaint, claim contribution from his co-sureties towards the common liability. Independent proof of the surety's liability under his guarantee must always be given at the trial. The creditor cannot rely on admissions made by or a judgment or award against the principal debtor