I wouldn't call it comedy gold if I was a British citizen. Trump is a bully and a narc who delights in intimidating/domineering other PMs for his own self of gratification. Unfortunately, too many leaders in western countries with economies exposed to exports to the US, are finding themselves in the same boat.
The opposite was Pedro Sanchez (Spain's PM) and the handshake with Trump. It was fascinating to watch the corporal language, pull/push in a handshake. But Sanchez is Spain's PM, the country with the biggest economy growth in the EU (40% of its total growth) and Spain diversified exports long ago and their exposure to Trump is limited. Starmer, unfortunately, doesn't have much room to manoeuvre.