I taught in a private school for a while. In England and Wales the law says that your employment “contract” is simply the verbal, written, or implied agreement to work there and the document enumerating the details — the
written statement of employment particulars which is basically the thing you or I would call “the contract” — doesn’t have to be supplied until up to two months after you’ve started work.
My employment particulars came the day of the two month deadline. They included a clause that said that the school had the final say on any claim brought by a pupil or their family against me for loss or damage and that any compensation would automatically be deducted from my salary. Unsurprisingly, I did not agree to this clause and did not sign the document! The school also refused to negotiate and I worked there for two years in a kind of contract limbo.
I’ve gone back to being a SWE now. I was lucky to not be beholden to one industry like my fellow teachers were. I can completely see how a sub-postmaster, without a fallback career, can get cornered into accepting some ludicrously unfair terms.