Traditionally there isn't a big "writer room" culture in England compared to the US. Usually one person, the Creator, writes every episode. Examples, Graham Linehan with The It Crowd, and Ricky Gervais & Stephen Merchant with the original office.

It's a lot of work for one person (or 2) to make season after season, so they mainly do short seasons and execute their visions for the show.

Here in America, we plop 20 people in a room and stitch together all their snippets into 10-24 episodes a season.

Different approaches, and different final products.

Ps. If you're interested in hearing more about this, there is an episode of Dan Harmon (creator of Community and Rick and morty) 's podcast with guest Graham Linehan, where they discuss this very topic. It is super interesting hearing it come from show creators themselves!