This one seems a little (oo-er) because it's a lottery as opposed to a "prize draw" with an element of skill involved. These things tend to come accompanied with a question to answer so there's an element of "skill" involved in the process. There's quite a notable youtube raffling off a Golf R at the moment in such a manner. (https://planetofdreams.co.uk/product/the-youtube-famous-560bhp-golf-r/)
There was a similar business idea presented to Dragon's Den and they laboured the point about being a prize draw with an element of skill to remain on the proper side of the law... Anyway, I did a little googling and this turned up -
Legal problems
Raffles risk being shut down if they breach the Gambling Act 2005. Only charities and not-for-profits are legally allowed to sell prize tickets where the result is based on chance.
To avoid being classified as an illegal lottery, a prize competition must involve an element of skill. So a raffle must ask entrants a quiz question that is tricky enough that a significant proportion will get it wrong and won’t be eligible for the prize draw.
The Gambling Commission has clamped down on raffles, taking action against 42 competitions in 2017 and 2018.
PayPal and Eventbrite have stopped their services being used for house raffles, making it difficult to set up a secure payment method.
Another obstacle is HMRC, which may regard the proceeds from raffle ticket sales as income subject to income tax and capital gains tax.
(from https://www.moneywise.co.uk/property/buy-sell/moneywise-investigation-are-dream-home-raffles-turning-nightmare)
Can't see Marcus keeping this one up for long...