UK law: Contract required for buying a website

THE SITUATION: - Person A owns a website that is generating a small profit each month - Person A wants to sell the website to Persons B + C but also retain a 25% share of the profits. - Persons B + C want to set up a Limited Liability company to transfer the website ownership to, and then issue a 25% share to Person A THE PROBLEM: - Person A doesn't want to wait 3 weeks to set up the LTD company. - Having the website belong to a personal account puts our assets at risk THE PROPOSED SOLUTION: - Persons B + C release funds to Person A, and Person A transfers website/rights to Person 'B' exclusively, immediately after signing a temporary contract - Temporary contract states after 30 days, the LTD business will be ready and the website ownership must be transfered to the LTD business - A 2nd contract will be required at the 30 day mark to iterate the standard shareholder agreement stating Person A's 25% stake and Person B + C remaining stake. I would like to discuss with someone whether my proposal is going to work (legally) or perhaps discuss alternative solutons. Then will be requiring a contract to be formed (for the 'temporary contract' first)