Probably wired in singles and earth, so brown singles and earth switchwire, blue last on circuit from previous rooms and twin and earth to the next down light.
Try pressing reset then reset and see if your panel returns to unset, if so try entering your own code again if this fails your panel needs resetting, which means removing the the front cover, so power down remove front cover disconnect battery, disconnect any cable in the set terminal and...
Looking at the cables you have there, you have a T&E with black tape on the earth and a pair of are vulcanised rubber (vir) cables which ceased to be used before 1960 so at a minimum it’s 63 years old, get yourself an electrician to check the condition of your wiring, you mot your car every year...
I don’t post here often but it amazes me how much sniping goes on, trying to score points from each other, completely unnecessary, just answer the question instead of trying to prove how smart you are. Another point why clutter your post with pathetic saying clean up your posts so we can read...
I’ve worked with some sparks who just can’t finish jobs because they get bogged down with the thoughts of all the bits, it will be “phil” go and give Dave a hand to finish that job, next thing you know he’s off to start another job your left with all his mess. This job you would need to go deep...
There no such thing as sample testing circuits, sample test accessories on a circuit yes, so a tester goes in plugs his loop impedance tester in the socket circuits a third of the circuits get tested a year later another band of cowboys turn up they test all the socket circuits this goes on and...
I think some sparks are as thick as plumbers or joiners, if I would have don’t that job you wouldn’t have seen anything out of the ordinary. Lots of sparks on here think domestic sparking is easy, it is if you leave a mess like, it takes a long time to become good at installing in people homes.
So you bought a house not knowing the condition of the electrical installation, you may need a £5000 rewire, did you negotiate a discount because of the condition of the electrics, seems pretty dopey to me
Phil
Would you buy a car without an MOT but you’ll buy a flat without an electrical report, so called EICR which your surveyor should have advised you to have done, quite unbelievable
In my opinion you have a 2 way switching for the landing and the same for the hall light not something most sparks do, normally it’s just a 2 way for the landing. So power off remove hall switch from the wall it’s probably a 2 gang switch now note the position of the 3 core cable in the switch...