Yes, if the original one is a spur you can just feed the new one from the downstream/output side. In fact even it it's not a spur.
I would not think you are likely to need the controller powered when there is no power to the opener.
Ah, yes, that is not just a switch it is also an RCD, so we can deduce that this is a TT supply and that you have an earth rod somewhere (photo of the earthing/bonding for completeness pls). Proceed exactly as ETAF suggested and let us know the result.
As above - however-
"and trips the main switch connected to the meter."
The main switch shown in your consumer unit does not have a trip function - which "main switch" are you referring to? Picture?
PS: That MK B20 MCB on the far left is not approved for use with the Wylex CU. Hopefully all...
The phone socket on a BT hub is for a normal analog phone and connects to BTs VoIP service.
Additional analogue phones can be connected using adapters available from BT which plug into a power socket near the phone and communicate with the router over Wi-Fi and also take normal analog phones or...
I'm guessing you bought it through Amazon rather than from Amazon.
Inventor are a UK registered company, their contact details are available on Amazon so you could contact them directly.
E1 suggests it's a common error; a likely cause is loss of refrigerant pressure - you'll need a suitably qualified engineer to top it up. In any case messing with aircon is not really a diyjob and can be hazardous.
Just connect the spare core to the earth terminal at each end (as well as the (hopefully G/Y sleeved) earth core). Then it's there if you need it in the future.
Oil filled radiator with timer.
You'll need to install a 13A socket in the toilet, you can't run it from a lighting circuit. It does not require an electrician to do this, it is well within the scope of a competent DIYer.
Where is the nearest 13A outlet? It may be possible to take a spur from...
If the seller has read this forum he'll tell you that the asking price takes into account the condition of the electrical installation, so no reduction, as often advised here.
There are ways to extend a busbar - that's not one of them, it may not be making good contact in the terminals and will be physically stressing the devices. Devices not aligned and busbar not fully inserted. Where's the busbar cover?
Given that BG busbars are not exactly expensive and are...