@th @ErinRose i know this is likely a shitpost but just in case: doing this will bend the prongs of the plug outwards over time.

also you get crappy electrical contact

i have actually seen this set up in a hotel in malaysia once but whoever did it pulled out whatever they stuck in the earth socket afterwards

if you want to do this "properly" you can buy adapters for fairly cheap that clamp onto the europlug and present a uk plug. it is actually legal to sell equipment with these installed in the uk because they are as permanent as a rewireable plug (which are fairly common in the uk and stuff still gets sold with them fitted). of course, cutting the plug off and fitting a rewireable one is also an option.