ACR WDB ALTDEV OVERSHOT DURING CLB OUT FROM LGW.

Narrative

DURING CLBOUT ON DEP FROM LGW TO AN ISSUED AND ACCEPTED ASSIGNED ALT OF FL250; THE LONDON CENTER CTLR REQUESTED A L TURN FROM APPROX 010 HDG TO 310 DEGS. I WAS HAND FLYING THE ACFT IN THIS CLBING L TURN WHEN THE SAME CTLR ISSUED TO US A COMMAND TO EXPEDITE THE L TURN TO 280 DEGS AND EXPEDITE OUR CLB TO FL250. I WAS UNCOMFORTABLE WITH THE SITUATION THAT MADE NECESSARY EXPEDITED TURNING AND CLBING AND VERBALIZED MY FEELING TO THE CAPT. HE AGREED BUT ALLOWED THAT THE CTLR WAS USING THE VECTORS TO SAVE US SOME UNNECESSARY TRACK MI. DURING THESE SHORT COMMENTS; I OVERHEARD THE CTLR ADDRESSING ANOTHER ACFT AND SAYING SOMETHING ABOUT A WDB WITH A COMMENT REFERENCING 4 MI. NO MENTION WAS MADE THAT THE WDB IN QUESTION WAS OUR FLT; JUST AS NO STATEMENT WAS MADE OF ANY ASSIGNED ALT DISCREPANCY. SOON AFTER; WE WERE ISSUED A NEW FREQ FOR ATC AND A RADIO HDOF WAS MADE. OUR FLT CONTINUED IN A NORMAL FASHION TO NEW YORK AND THE FIRST KNOWLEDGE TO ANY CREW MEMBER OF ANY PROBLEMS WAS WHEN WE WERE MET AT OUR ARR GATE BY OUR BASE CHIEF PLT. THIS IS A COMPLETE STATEMENT OF MY KNOWLEDGE ABOUT THIS INCIDENT BUT; IN NEW YORK WE WERE TOLD THAT IT WAS BEING CLAIMED THAT WE HAD CLBED THROUGH AN ASSIGNED ALT OF FL230 AND WERE WITHIN 4 NM OF TFC AT THE SAME ALT. SUPPLEMENTAL INFO FROM ACN 194527. THERE EXISTS THE POSSIBILITY THAT THE PROPER ALT WAS SELECTED AND WHEN THE ALT SELECT KNOB WAS PULLED AFT; THE SELECTED ALT WAS ALTERED.