Two developments in the news made me think of the role of the United Kingdom (UK) has played, and might play, in the Signposts.
First a British frigate, the HMS Montrose, attempted to intercept Iranian naval forces and prevent the British tanker from being stolen. The second news story reports the UK is attempting to assemble an all-European naval force to guard the Strait of Hormuz.
UK and the First Signpost
The UK did participate in the First Signpost. Of the international force that invaded Iraq in 2003, removed Saddam Hussein, and made the lion stand and changed its mind (per Dan. 7:4), the UK provided just under 9% of the force. (The UK provided 45,000 troops of the total force of 514,000 troops from western nations.) So we may think of the USA as being in Bible prophecy as the force that made the lion stand, but the UK was part of that force also.
UK and the Second Signpost
Being involved with the First Signpost, could the UK also be involved with the Second? It will still likely be the USA that executes a first strike on Iran, or Iran on American military forces in the region that triggers the Second Signpost.
We do not know at this stage, though, how UK military forces may be involved, or if they are involved at all. Just being militarily present in the region the UK increases the chances of being involved.