It is April 29 2025, 100 days after Donald Trump’s inauguration, and he is making headway with his promise to end the war between Ukraine and Russia.

The president is sitting in a conference room at a five-star hotel in Switzerland overlooking Lake Lucerne.

He is flanked by Vladimir Putin on one side and Volodymyr Zelensky on the other, marking the first time the warring leaders have been in the same room since an ill-fated meeting almost six years ago.

They both watch on nervously as Mr Trump plots an American-guaranteed ceasefire line on a map of Ukraine.

But the catch is it won’t be American troops patrolling and policing the resulting 800-mile buffer zone from the tentative peace deal, despite Mr Trump’s presence.

The next phone calls are to London, Paris and Warsaw, looking for a commitment to lead a European force capable of undertaking such a task.

A decision is made that the onus should fall on Sir Keir Starmer and the UK’s Armed Forces to spearhead the post-war peacekeeping force in Ukraine.

Of course, this scenario is entirely fictional.

But with Mr Trump reportedly not willing to finance or send American troops to uphold peace in Ukraine, it is not entirely unrealistic.