So much UK govt bureaucracy could be removed. Like tax returns - they have the data already, just send me a bill, and let me query it if I disagree (like it works in other European countries). Or Making Tax Digital, which incredibly is worse than the previous system. Or VAT registration/returns which my partner has to do, which overlap with MTD and acts like a kind of second tax system.

You are going to love Digital VAT, closely followed by Real-Time VAT.