Practice – Amendment. The claimant companies' application to enforce the decision of an adjudicator in a construction dispute succeeded. The adjudicator had made an error in the calculation of sums payable, and had then corrected himself. The Technology and Construction Court held that the error that the adjudicator had made had been the sort of error that fell within the statutory slip rule. Further, once the door had been opened to correct the initial error, then the effect of that decision permitted and, in the interests of justice, required, that any corrections consequent upon the correction of that gateway error to be made.