(If the swbd is in a cupboard, we only need it when the cupboard door is open)
Clause 220.127.116.11 covers both access & emergency exit requirements.
The only Exception is clearly stated to apply only to "doors of switchrooms" and "emergency exit facilities".
So anything that isn't under one / both of these headings applies in all cases.
Both these are "exit" provisions; so the Exception can't apply to anything that relates to access.
In para 1; (a) is specifically about access, (b) is about adequate space to operate or adjust (ie access), and (c) is about exit.
So the Exception can apply to (c), but not to (a) or (b).
Para 2 provides more detail on both access & egress; and like para 1 is split into 3 parts.
(iii) is about "access to the switchboard", and (ii) is about "emergency exit paths"; so the exception can apply to (ii) but not to (iii).
The tricky bit is (i); which doesn't state that it's specifically about access only, or egress only - and in fact the 0.6 m dimension is for both purposes.
Access aspect is that if you haven't got 0.6 m in front of the swbd itself, you haven't got enough space to operate / adjust.
Egress aspect is that if you haven't got 0.6 m around the doors and racked-our gear, you risk being trapped by these obstructions.
Worth looking at 2018 edition; where the clause has been amended .
In particular, para 2 has been changed to apply the distance separately to access & egress aspects.
For access; 0.6 m increased to 1.0 m for non-domestic;
and states it applies only to those faces of a swbd that need to be accessible (currently this has to be deduced from the Figs).
In most cases, a domestic swbd will only need to be accessed from the front.
For egress, the distance remains 0.6 m for all cases.