Can I buy a house for my mum to live in rent-free?

Q My mum is 52 and lives on her own on a low income in the north of England. I rent and work in London and am fortunate enough to be on a fairly good income. My mum, however, is struggling, so two years ago I started covering her mortgage payments. She has approximately £90,000 equity in her home and an outstanding mortgage of £50,000. She earns only £18,000 a year.

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