Powerline adapters have a bad reputation.
I use TP-Link PA-717/27010/7017P adapters with no dropouts
I've moved house and some sockets seem to droput or not connect when I pair them.
What could be causng this and what is a solution, is it a noisy line/interference?
Would the G.hn powerline adapters be more resilient? From the blurb on it seems they should but before I go to the expense of replacing my existing adapters can anyone let me know their experience.

And yes I know I should install Cat5 but it's not possible otherwise i would.

I think it likely some electrical interference from other machines on your power lines, what have you got plugged in nearby(?), maybe try using a different socket, for your equipment.

I gave up using mine, because one socket, the most convenient, gave me problems - maybe you could try a wifi booster instead(?).

There's only my PC, a couple of dc adapters for my screen, switch etc but on another socket.

My TV is absolutely fine, my office upstairs is the problematic one, I'll try another socket.

Any idea about the newer standard G.hn?

No, never heard of it, sorry.

No probs, but her's an update, I cleared everythingplugged into the adjacent wall socket (it's a dual socket} a coiple of adapters form switch and a usb-rj45 switch, and so far so good, no dropouts and solid green powerline connection.

The key here is probably the "some sockets" part.

Depending on where you live, it may be common practice to feed 3-phase AC to the breaker panel and then connect the various circuits to different phases, probably for load balancing purposes. If that is the case for your house, powerline adapters may only work reliably on circuits using the same phase.

No, here in the UK it'll only be one phase - I did live i a property years ago thet had three phase, one for lights, sockets, cooker etc, one for the electric storage radiators and one for the garage. But I'm 100% certain the property I'm in now is single phase.