marinyork said:Er no, I wasn't particularly making a point of it but if you're going to insist, you are factually wrong. The royal parks are not covered by local bylaws, they are covered by primary legislation and SIs. Unless you mean local in a broad sense which is contrary to this discussion and then many things would be local e.g. a no motor vehicles zone.
So. Now I've done some more looking and found the SI that covers this (Royal Parks and Other Open Spaces).
"May not drive or ride any vehicle on a Park road in excess of the speed specified in relation to that road in Part II of Schedule 2 to these Regulations". Part II, Schedule 2 states that speed to be 20MPH.
So, as long as a bicycle is classed as a vehicle, which we've ascertained it is, it's limited to 20MPH.
Some road signs apply to cyclists, some don't. Whether you call it local or not (local meaning in terms of law in this discussion) or how it interacts at different levels it doesn't matter, we all agree, except apparently Lizban.