Omaze is offering a £5 million London home endorsed by David Beckham as its grand prize, along with £250,000 in cash, to support London's Air Ambulance Charity. The property includes luxurious amenities like a gym, spa, and games room, with the option to sell, rent, or live there. The draw aims to raise at least £1 million for the charity to fund two new helicopters. The winner will inherit a mortgage-free, elegantly refurbished 4-bedroom house with modern design and historical character. Entry costs £10, and the draw closes in July, with the property being the most valuable ever offered in a UK prize draw.