I live in UK, and I have a full-time job with a salary that makes me a higher rate income taxpayer. Additionally, I am registered as a sole trader: I operate a software-as-a-service website, and I provide access to it for a fee. Because I already have a high salary from my main job, the income from my website is taxed at a higher rate (40%).
Is it legally possible for me to transfer the ownership of my website to my wife, who is currently a non-taxpayer, and have her receive all the profits into her own sole trader bank account? This would make the income from the website non-taxable, saving our family a considerable amount on taxes. In theory, I could give her exclusive administrative access to the website (all passwords, etc.), and she is totally capable of assuming all responsibility for it, including her becoming the GDPR data controller. The website itself is fully automated and does not currently require any regular work from my side to keep it operational (except for paying for web hosting once a year), so it's largely passive income.
Are such transfers considered legal in UK?