So where does winner fall on UK's rich list?

If the winner does come forward, where can they expect to place on the UK rich list?

428

Wealth: 163m

Name: Lance Uggla

Source of wealth: Launched his company Markit Group from a barn in his home in 2001. The Canadian bond trader spotted a gap in the market for providing banks with vital data on their trades with each other.

429

Wealth: 162m

Name: Brian Scowcroft and Janet Lefton

Source of wealth: Insurance and property. Mr Scowcroft is the former boss of the insurance group Swinton Insurance. The family raised 150m through its sale.

430

Wealth: 161m

Name: Unknown

Source of wealth: Landing a 161m windfall after winning the EuroMillions Lottery.

431

Wealth: 160m

Name: John and William Asprey

Source of wealth: Renowned in the world of jewellery, the family sold the 230-year-old business in 1995 for 100m.

431

Wealth: 160m

Name: The Marquess of Bath

Source of wealth: Fortune based on property and art. The Marquess, 79, handed the running of the Longleat estate, house and safari park in Wiltshire to his son.