BOAC, with respect, the BA flightplanners probably gave you a plog fuel that was quite fat in the first place. You know, sensible diversion airfiled, realistic cruize alt, full contingency etc etc. Mate of mine, with a Mid East carrier, was always top of the fuel league tables because he always carried "min". He argued that the min figure was always generous. No need to round off to the next couple of hundred kgs etc. He had worked, previously, for a bucket & spade outfit that, quite legally, cut all the corners but offered alarmingly low plog fuel fugures. For that outfit, he was always at the bottom of the league and regularly asked why he kept rounding up the plog fuel ! I followed him into the same ME carrier & tried to convince them that they were carrying too much fuel ! Got nowhere !