FLT CREW OF B777 ON ARR TO EGLL INSTALL THE APCH TO RWY 9R VICE RWY 9L IN THE FMS. FLY THROUGH RWY 9L FINAL AND START TO INTERCEPT RWY 9R BEFORE ALERTED BY EGLL DIRECTOR.

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WE HAD BEEN VECTORED NUMEROUS TIMES PRIOR TO ENTERING THE HOLDING PATTERN AT OCK VOR; AND WERE SUBSEQUENTLY GIVEN A HDG TO DEPART OCK FOR VECTORS TO THE ILS TO RWY 9L. ALTHOUGH WE BRIEFED RWY 9L; AND HAD THE RWY 9L APCH PLATES IN FRONT OF US; ALL THREE OF US MISSED THE FACT THAT THE FO HAD SELECTED RWY 9R FOR THE APCH. WE WERE GIVEN A CLRNC TO INTERCEPT RWY 9L FROM THE S; ON A HDG OF 040 DEGS; AND THE FMC INTERCEPTED RWY 9R. AS SOON AS THE CTLR ASKED US TO VERIFY THAT WE WERE INTERCEPTING RWY 9L; WE REALIZED OUR MISTAKE; AND RE-ENTERED RWY 9L IN THE FMC; AND ASKED THE CTLR FOR A HDG TO INTERCEPT. THE FO TURNED TO THE ASSIGNED HDG; BUT WENT THROUGH THE LOC; WHICH CAUSED ME TO REQUEST NEW VECTORS BACK AROUND FOR ANOTHER INTERCEPT AND ANOTHER APCH. HEATHROW APCH CTL GAVE US VECTORS AROUND; AND WE RE-INTERCEPTED RWY 9L; WITH NO FURTHER PROBS. THIS WAS SIMPLY A CASE OF LACK OF ATTN TO DETAIL; FOR WHICH I ACCEPT FULL RESPONSIBILITY. ALL THREE OF US FAILED TO PROPERLY ASCERTAIN THE IDENTIFIER FOR RWY 9L; OR CONFIRM THAT RWY 9L WAS DISPLAYED ON THE NAV DISPLAY; OR IDENT RWY 9L. THIS INCIDENT REAFFIRMS THE NEED FOR ALL THREE PLTS TO VERIFY EVERYTHING; TAKING NOTHING FOR GRANTED; AND TO BE VIGILANT IN CONFIRMING ANY AND ALL ENTRIES MADE TO THE FMC.