Sorry, lacking sleep and wasn't clear! I didn't mean an industry-sponsored PhD - I meant a fully funded PhD, e.g.:

  These add a non-repayable, tax-free maintenance grant known as a 'stipend'. In 2018/19 this is worth a minimum of £14,777 and it can be used towards living costs. https://www.prospects.ac.uk/postgraduate-study/phd-study/phd-studentships