they have been replaced by R for HN and S for HP with new cat1 holding points as well as the old cat3. This is give a faster line up as you can fit a B737 into the space ahead of the cat3 point. However R1 is in quite a dip and taxying out requires a lot of power but then if the A/C keep moving it is a quick departure, as shown yesterday when the twr guys were getting a/c away in 4 mile gaps.
