The tax system would have to ensure that everyone paid their share which, I believe, would mean a readjustment on unearned income. One of the suggestions is that, with UBI payments, you drop the Personal Tax Allowance and each person gets something more like £240 a week. All income-related benefits would go and there is even an argument that some other benefits would go.
The challenge would be housing but we have long needed to readdress social housing.
For those who haven't seen them these are the five characteristics of Basic Income:
1. Periodic—It is paid at regular intervals (for example every month), not as a one-off grant.
2. Cash payment—It is paid in an appropriate medium of exchange, allowing those who receive it to decide what they spend it on. It is not, therefore, paid either in kind (such as food or services) or in vouchers dedicated to a specific use.
3. Individual—It is paid on an individual basis—and not, for instance, to households.
4. Universal—It is paid to all, without means test.
5. Unconditional—It is paid without a requirement to work or to demonstrate willingness to work.