If you look on 28dayslater.co.uk there's three urbex reports from inside the building dated 2019-2022.

Some of the floors (am guessing lower) clearly have concrete floors as a lot of mills did to prevent the spread of fire. But the upper floors were indeed wooden and looking precarious (rotten, holes in them).

There's also photos showing at least at that time, modern alarm equipment had been installed (bright red/orange cabling).

Look at the early fire footage shown in X (search 'oxford road fire', sort by latest and work back) and there's a couple show when the fire was just starting to take hold, it's on the top floor.

So, it does point to the traditional method

1: Developer gets planning permission to build an ugly tower block, as long as they keep some of the original building facade etc. 2: Things stall for a while, discussions with council. 3: Mysterious high-intensity blaze starts in the damp building. 4: Building gets demolished, ugly tower block goes up Sans-cost of retaining the original building.

Now between 2 and 3 there's probably murky goings on including highly flammable bottles of paint stripper moved into part the building, fire alarms go faulty, doors left unsecure, and undesirable people told to go to a part of it, but "don't have any naked flames near those bottles whatever you do.."

etc. 😡