WBD PLT NOTICED AN EXCESSIVE FUEL BURN DURING CRUISE. ON APCH THE ACFT SPD WAS INCREASED BECAUSE OF A DETECTED WT DISCREPANCY. EXCESS AND UNACCOUNTED FREIGHT WT IS THE SUSPECTED REASON.

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I OPERATED AN ACR CARGO FLT FROM ORD TO EGPK (PRESTWICK UK). DURING THE COURSE OF THE FLT I NOTICED A CONTINUED FUEL OVER-BURN. BY THE TIME I ARRIVED IN EGPK THE WX DETERIORATED TO THE POINT TO WHICH I DIVERTED TO EGCC (MANCHESTER UK). AT THE POINT WHERE I DECIDED TO DIVERT THE FLT WAS 5700 KILOS BEHIND ON THE FUEL SCORE. THE FLT WAS SCHEDULED TO LAND AT EGPK WITH 16600 KILOS. I BLOCKED IN AT MANCHESTER WITH 5900 KILOS. ON THE APCH INTO EGCC I NOTICED THAT THERE WAS A WT DISCREPANCY CAUSING ME TO FLY A FASTER FINAL APCH. THE SPD WAS FASTER THAN WHAT I ORIGINALLY DETERMINED TO BE MY FINAL APCH SPD. ONCE ON THE GND I SPOKE WITH THE DISPATCHER; DO; AND MGR ON DUTY AND WAS TOLD TO CONTINUE TO EGPK AFTER REFUELING. THE APCH TO EGPK WAS AGAIN FAST AND ONE OF THE EGPK OPS PERSONNEL MADE COMMENT OF MY SPD. I REQUESTED TO HAVE ALL THE CARGO WEIGHED AT EGPK PRIOR TO GOING TO CREW REST. THE NEXT DAY I WAS TOLD THAT NOT ALL OF THE CARGO COULD BE WEIGHED BECAUSE EGPK DID NOT HAVE THE NECESSARY EQUIP TO OFFLOAD THE 2 POS I THOUGHT WERE OVERWT. I SPOKE WITH DISPATCH AGAIN AND TOLD THEM THAT I FELT THE AIRPLANE WAS STILL OVERWT. I WAS TOLD ALL THE CARGO WOULD BE WEIGHED AT THE DEST; AMSTERDAM. I HAVE HEARD NOTHING FURTHER FROM THE COMPANY OFFICIALLY ABOUT THIS INCIDENT.