I'm based in the UK and I'm looking into replacing my Powerline adapters. What are my options?

Currently my WiFi struggles to make it from room to room and I do not want to start running CAT cables up walls or under floors. Although I would prefer this it's just too much work at the moment.

I'm looking for stability, speed wise my connection is about 70 down and 20 up but some room to flex would be good if a faster option becomes available where I live.

I was concerned with some devices they just repeat the WiFi signal and thus gets slower. And also a lack of wired connections where possible like with Powerline that can do both.