Rules about buying a flat for cash ?

[isthereaway]

A relative of mine has hinted that they are considering either loaning or outright giving me £75K to buy a flat. I'm really touched at the thought but before I get even remotely excited Can I ask:
Would I have to pay tax if they gave me money? I'm on UC atm so I know I'd have to tell them if the money went into my account rather than direct to the solictors for the flat purchase (I think I'd have to tell UC even then as I'd then have an asset I don't have now!) My UC would stop but if I spent all the money on a flat would I then never be able to claim again (I am a Carer for disabled kid)
Are there rules about how long the money has to be in an account - would I have to prove where it came from etc? Does anyone know please? I am not sure my relative does, & I certainly don't. thank you if reading.

I don’t know about the UC questions but no tax is due on gifts.

As far as uc is concerned if the relative buys the flat for you and puts it in your name then you can continue to claim, just minus any current rent elements they're paying. As said, no you wouldn't pay tax on it.

Bear in mind if the giver dies within 7 years of the gift, it would be added back to the estate for IHT purposes. (Not an issue for many).