On a clear day a visual approach to R/W13 was possible and the CX pilots often did it, they being very familiar with the place.
For the rest of us it was usual to do an IGS, (Instrument Guidance System), approach which gave you Localiser and GP information down to a height of approx. 650' but on a track 45degrees to the R/W QDM, by which time you should be visual with the runway and able to complete the turn on and landing visually.