Never landed on 23 but returning from our honeymoon in 1977 England was gripped in some bitter weather and a strong NE wind meant our T3 from faro landed on 05. We seemed to fly right over head LHR at maybe 6000 ft turning left to the north of the airport then a long downwind leg to the west before turning back towards final approach . I think from my airband radio days they used a radar controller based approach with constant changes in heading of a few degrees and advice as to above or below glideslope not ILS as 05 didnt have it ( the wooden approach light poles were a give away that 05 was the Cinderella of LHRs runways )
Of course stretching my memory back further I can remember lots of take offs and landings on the parallel 23R/05L mostly prop stuff and a vague recollection of a BA DC3 Dakota landing over Bedfont on the long long gone Se-NW runway that i think went when T3 was built.