Except the Netherlands is a flat country and the UK has a large area of high ground running down the middle of it. There is not a lot of difference when you compare the whole of the UK, but regionally some parts of the UK are very wet. The Netherlands does not get as much rainfall simply because there is not much high ground to force pressure changes with the clouds.

https://www.worlddata.info/climate-comparison.php?r1=netherlands&r2=united-kingdom

Now I want to have a comical photo where both the Netherlands and the UK are seen, but the Netherlands is people biking in the sun, picking up fruits from trees that have smiling faces and then England being under a dark roof of clouds and rain, dirty peasants with rags for clothes pull carts through the muddy streets.