I currently have been using a Huawei P30 pro and have been really impressed by it. The camera is amazing, it has kept its battery life over 2 years and I can honestly say I've had no issues at all. If Huawei had a newer model that was compatible with the Google Play store, then I wouldn’t hesitate in taking it but the lack of Google support in the new devices means I would lose access to apps accumulated over the years.
I have been looking at the Samsung Galaxy S21 (Either plus or Pro) but this would add around £10 to my monthly cost to what I am currently paying. I have also looked at the Google Pixel phones
Really keen to hear what phones the Community members use and suggestions for an upgrade in the comments below.