Friend of mine just told me the company he works for deal with the council in that area on a regular basis and they've had word the wiring in the building was so poor there were surges everyday, not electrically savvy at all so is that normal?
Surges are nothing to do with the wiring. Black outs and trips would be wiring. A surge would be from the supplier so probably a old transformer on it's Last legs. But these are normally submerged in oil so no air can get at the coils to cause sparks.
Plus the wiring will be just as good as when it was installed the only major difference between the refs then and now is the preferred type of earthing systems, protection systems and placement of components.
Oh and colours.
Doesn't look like a gas fire they go up with a big bang first.
Probably a old electrical appliance overheated and caught fire and then set everything else on fire expect a interesting hse report.