Charity and trading company were/are separate (as practically required, in the UK)

A charity can't really trade in the same way a company can. For example a charity can't register for VAT (sales tax).

The way it normally works is that a charity exists which takes donations and does charitable stuff, then a seperate company exists which makes money and sells stuff (does trade) and it happens to be run by the same folks, and donate money to the charity (or have some kind of 75% of our profits get donated to charity) promise. That's super trivial to unwind as the charity often has no formal ownership over the trading company, it is really just a beneficiary.