Thanks to everyone who took the time to reply.
I don't know if I've come to a concrete decision yet.
Every time I think I have, I then go and watch or read something and my interest gets piqued elsewhere or the doubting Thomas appears on my shoulder.
For example.
I decided on a BMW 5 series 3.0 diesel. Not that many on Auto Trader in my price range (upped to £20k) Even then there's on 7 cars under 60k miles.
So then I look at 3 Series with same engine. Then I watch and read reviews. Then I think if, I'm going to get the 3 series, I may as well go for the 2.0 petrol. Then I get in to BMW's seemingly low reliability and customer satisfaction ratings. Then I watch more videos, that don't seem to really address or even worry about reliability as such and just say what a great cars they are.
Then I watch comparison videos and other related stuff and now, of all things, I'm looking at E class Mercedes estates.
I'm driving my wife nuts with all the different cars I keep showing her. I'm driving my self nuts with all the chopping and changing. At this rate I'll just say "screw it" and buy nothing.
At least I think I've narrowed it down to a reasonably small choice. Maybe