[DamonHD]

I'm really confused about (not complaining, just not understanding) the downvotes.

These are statements of neutral fact, and the whole process is described in some detail on my site, for each room that we retrofitted.

I don't understand if I have caused offense or something: apologies if somehow so!

[joncrocks]

I'm not sure, but I think that the reason that radiators are placed near windows (at least historically) was to avoid hot/cold spots in rooms.

By placing the radiator near the place that is likely the coldest place in the room, you ensure that the room is an even in temperature as possible. Rather than to counteract 'cool draughts'. I think.

So perhaps people thought that your initial comment was wrong/misleading.

But if you have triple glazing and this mitigates the heat loss, then the coldest wall of your room may no longer be the one with a window, so you may well be doing the right thing for your room(s).

[DamonHD]

Even if the coldest wall is still the exterior one (it should be, thermodynamically), best maintaining comfort in the room need no longer be by pumping heat out through that wall (or window) to reduce thermal gradients in the rest of the room. Those residual gradients (and, eg, cold drafts down those cooler exterior walls) can be small enough to not need fixing any more.