(IDEX Online) - Formula One heiress Tamara Ecclestone is offering a $7.2m reward for the return of jewelry stolen in Britain's highest-value house burglary.Three Italian nationals were jailed last November after they made off with valuables worth over $31m (at today's exchange rate) from her 57-room mansion in Kensington Palace, London, while she and here family were on holiday in 2019.But most of the jewelry is still missing and a fourth man, believed to have masterminded the operation is still at large.Ms Ecclestone (pictured) yesterday announced she was offering the reward "Mel Gibson-style from the movie Ransom" to get her jewelry back.She posted on Instagram: "If you are the source, you get the reward. It is that simple."With the total value of the burglary being ?, ?26m - that's a reward of up to ?, ?6m for anyone that can help me get back what is rightfully mine."Mother-of-two Ecclestone, 38, is a model, socialite, TV personality, and daughter of the Formula One Group former chief executive Bernie Ecclestone.Her home, bought for $60m in 2011, was targeted despite 24-hour security patrols and extensive surveillance measures.