In the UK it used to be "You do not have to say anything, but anything you do say can(/will?) be taken down and will(/can?) be used against you in a court of law." Or thereabouts.
These day's it's something like... "You do not have to say anything, but it may harm your defence if you do not mention when questioned something which you later rely on in court. Anything you do say may be given in evidence."
(If it's changed since I stopped watching The Bill, which itself has wandered off the TV screens, I don't know of it.)
It's an interesting change.
My last contact with a policeman, BTW, was a couple of months ago when someone broke into one side of a building I was working out-of-hours in (activating a silent alarm system, or if it wasn't silent, out of my earshot), and one of the officers investigating saw that someone (me) was beavering away in this other side. It could have gone a lot worse than how it did (cop came in the outer door, triggering the entry beep, I saw it was a cop and let them in and justified my presence and helped give details about who to contact and showed how as I didn't even have an unlocked route to the other area, thus the building being safe from me, and me being safe from whatever villains caused this particular alert).
But apart from an 'off-hand' comment about a colleague searching the building being a K9 unit (I never did see a sign of any dog, I'm betting it was a standard veiled threat designed to provoke a response in the guilty, to which I clearly had no reason to respond so[1]) it was all chummy enough. I was clearly enough harmless- (and/or scatterbrained-)enough to not require such legal terminology as I mention. Questions were asked as to
why I was working late, I hear, as the investigation progressed, and perhaps if I was in any danger by being so[2]. But face-to-face I had no problem with this police intervention, even while this officer was not affeared of his life as to actively pursue the use of whatever disabling technology he had upon his person (spray, baton, whatever).
In many ways, that last sentence may be grossly inaccurate if such a situation were to be enacted over in the Rebellious Colonies, thanks to the general and all-pervading misunderstanding of the "militia" clause in their quaint constitutional documentation.
[1] But... if I was afraid of dogs? Could that have given a false-positive response?
[2] Like I said, there's an entry beep on the external door, and I always keep the internal door locked, but in a way that I can escape in an emergency. And if I were incapable of escape, people would know that I am inside and could break their way in, and if unwanted persons tried to break in while I was conscious I'd be very quickly on the phone to
request police assistance. Most angles are thus covered, although of course we'll never know if they
all are until they eventually get put to the test.