@ParkInLondon wrote:
What can I try to resolve this issue?
The most likely thing to cause these types of issues are failing capacitors in the mains power supply wall plug.
If you have a multimeter, you could check that the voltage at the DC connector is within 10% of the voltage stated on the plug.
Alternatively, if you have any spare power supply plugs from any old electronics that has the same voltage, similar wattage, and identical plug size, just substitute a different power supply to see whether the problems disappear.
Another cause could be that over time, the router's configuration might have become corrupted, perhaps due to mains outages, etc. You could try performing a FACTORY RESET to completely clear the settings, and hopefully start again from fresh.
According to the Plusnet help page for the Hub One - https://www.plus.net/help/broadband/router-user-guides/hub-one/
If you're having problems with setting your router up, it might be worth resetting it. Use a paper clip, pen, or something pointed to press in the reset pinhole button on the back of the router.
Keep the button pressed for 20 seconds. When the light on the front of your Hub turns green, release the reset button.
When the light on the front of the Hub turns blue, it's now restored to factory settings.
Keep in mind that if you do this, it'll completely restore your router to the settings it had when it arrived. So if you've made specific changes to your settings, they'll need to be made again.
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