Fool's Hole
You have to understand that the CAA recognise two distinct classes of pilot:
The really big aeroplane important pilot who flies half-way round the world in a mega-jet and lands at Heathrow, and the "others".
The Heathrow jet-tropolis pilot can read and so will know the elevations from his/her charts.....the "others" are assumed not to be able to read, and despite flying into and out of the same airport day after day, week after week, need to be verbally informed of the elevation.
Funny thing though, I would have thought it should be the other way round.....but when there is a need to reduce R/T chat to the bare minimum, and to talk to foreign pilots from the other side of the planet, it is amazing what can be dispensed with.
Methinks time for a common-sense update to the "manual".