I don't think parking on the footway is an example, no. People do it even though it's not allowed (or, as I understand it, more strictly driving onto the footway in order to park is not allowed)*.
What I meant was that, until the 50s/60s, it was assumed that a cycle being pushed was a vehicle - hence we were taught to walk on the footway and push it in the gutter. I'm not sure that there was any case law, and I'm pretty sure that there wasn't much else either. Now, however, the general assumption, reflected in everyone's behaviour, is that this is not the case - hardly anyone objects to a cycle being pushed through a pedestrian area, unless it's exceptionally crowded or something, and then only because the bike is an obstruction and not because it's actually illegal for it to be there.
Not everyone agrees with this interpretation, which is one of the reasons that we are on page 11. However, as I see it, there are issues such as this for which there is no right answer. The law doesn't really consider the case of a cycle being pushed, and assumption is all that we have until someone ends up in court and creates case law. All the existing case law has been discussed to death in this thread.
* However, parking on the road is apparently an example of changed assumptions. Roads are, fundamentally, places for the free passage to and forth of the public and their goods, or words to that effect. Vehicles are secondary things that the public, under certain conditions, may use to achieve that passage. Parking a vehicle is not "free passage". So, in the days of horses and carts, I am given to understand, you jolly well didn't leave your cart (or your horse) obstructing everyone else's free passage. If you were "rich" enough to have a cart, you'd also be "rich" enough to have a yard or other off-road place to keep it. Only as motor cars proliferated did people start to obstruct the highway by leaving them there when they were not being used. After a few failed attempts to prosecute people for this, assumptions changed to the extent that we now have yellow lines to mark the minority of places where the old interpretation is actually enforced (or not, as the case may be). Pavement parking has not (quite) yet reached that stage.