Second division, 29 January 1988. Farrans (F) contracted with the respondent employers (D) to build Dunfermline Sports Centre under JCT 1963 (Local Authorities Edition with Quantities) and Scottish Supplement. Disputes between the parties were referred to arbitration, with F claiming for extension of time , for an inaccurate measurement of the works done and for a sum which it was contended should have been certified by an architect. D counterclaimed; the matter went to proof, during the course of which the parties settled the arbitration by joint minute on 30 June 1986. After hearing parties at debate, the arbiter awarded interest on two sums from 15 March 1983, which was the date at which he deemed the architect should have certified the sums due, and on two sums from the date of the joint minute setling the arbitration , all at 15%. The respondents appealed to the Court of Session on several grounds including that the arbiter could not award interest from any date prior to the dat