Looks like a cracking house.
As said, I looks like very old cable, likely no strain relief, and it's all decided its too much. Probably touching the two cables together as it fell. Also appears to have no earth. Make sure the wires are not touching each other, protect them with some tape, and turn the power back on and wait for electrican.
Personally on replacement I would want to avoid fitting a model ceiling rose to the plaster moulding at all, rather run the new flex cable straight through it into the underfloor void and connect up there with suitable strain relief. Floor above will likely need lifting to connect to the old cable anyway.
You may also find the electrican hesitate to connect the old fitting back up without and earth if it's metal. He might also suggest a whole house re-wire, but that's maybe another topic!
Daniel
As said, I looks like very old cable, likely no strain relief, and it's all decided its too much. Probably touching the two cables together as it fell. Also appears to have no earth. Make sure the wires are not touching each other, protect them with some tape, and turn the power back on and wait for electrican.
Personally on replacement I would want to avoid fitting a model ceiling rose to the plaster moulding at all, rather run the new flex cable straight through it into the underfloor void and connect up there with suitable strain relief. Floor above will likely need lifting to connect to the old cable anyway.
You may also find the electrican hesitate to connect the old fitting back up without and earth if it's metal. He might also suggest a whole house re-wire, but that's maybe another topic!
Daniel