I agree with you, and it is inevitable UBI has to happen not just in UK but all over the world. It isn’t if, but when, and how much. and since it will be the vast majority demanding it, whichever govt is in power will have no choice but to give it.
Further, as we saw, there can be no claims that "we can’t afford it", money can be printed arbitrarily and issued without loss of value, or any kind of accounting for it, it actually goes up in value when issued, not down, because there is now wealth being pumped into the backdoor of the world economy via bitcoin which is largely solar powered, the banks should be grateful for that.