@Kevin_Z Hi Kevin, the network has stablised by taking the powerline adapter offline. Then it occurred to me to reset both devices and try again which I did and the router immediately rebooted. Then...

@Kevin_Z Hi Kevin. Thanks again - I have disconnected the PowerLine Adapters for the time being. We'll see how it goes.

@Kevin_Z Thanks Kevin, I have disabled the EasyMesh, so we'll see how it goes. Unfortunately it can be fine for hours and then restart every 5 - 10 minutes for a while. I can't fathom any changes to...

@Sunshine Thanks for the information. Unfortunately my router has the up to date firmware but still regularly reboots. I do have a couple of range extenders that seem to be causing the problem. Would...