RE: Skip to content link

> there remains a mechanism after all even if it only becomes visible once
focused?

I did cover that point when I said "all skip links must be visible when a
user tabs onto them". Perhaps that wasn't clear - by "tabs on to them" I
meant the user moves on to them using the Tab key!

We don't mind them not being visible when the page loads. Web designers
prefer  that so the admittedly unsightly link doesn't spoil their carefully
crafted page header - fair do's to them on that, and it is a very common
pattern that all keyboard users are used to now. Just so long as the Skip
links become visible when they have the keyboard focus. ie when the
keyboard user lands on them.