Hi, thanks for the replies.
I'm getting somewhat dispirited because I have been a user right from the start, upgrading from the original to the rosetta. I have gone through a number of Pi's, bridges, cables, SDR dongles and power supplies. Part of it has been the natural evolution of the kit, but reliability/robustness of components (PAW bridges excepted) hasn't been great either. I've seen how good it can be, but I'm on the verge of giving up with it to be honest.
You say your WiFi isn’t appearing now - despite both screenshots showing that you were able to connect when they were taken, so I would suspect the problem could be the WiFi dongle or Motherboard.
My screenshots were of when the wifi was working (for a time), and now it's not appearing on the available list at all (although the little led on the wifi dongle is flickering as usual) so I can't connect.
If I have the correct power supply, plus the correct cables, how likely is it to be the Pi micro USB connector? (I've seen the thread on this subject). A faulty wifi dongle doesnt't explain the throttling?
so it might be time to upgrade to a Raspberry Pi3B (which has on-board WiFi) or upgrade to the newer Pi3B+ - though for the B+ you will have to wait until the new software is released
Pi3B and Pi3b+ are about the same price I think (another £30). When is the update coming out?