BRITAIN’S biggest lottery winners have sold the mansion they bought shortly after scooping their £161 million jackpot.

Euromillions winners Colin and Christine Weir got rid of the country home – their first big purchase following their win – after moving to a bigger property.

The couple swapped their three-bedroom detached home in Largs, Ayrshire, for Knock House, which sits just north of their home town.

They bought the property, which has a walled garden and views over the Firth of Clyde, for £850,000 in August 2011 – just a month after their win.

They spent the next few years upgrading the property but decided to sell up after buying Frognal House in Troon for more than £3m.

Knock House, which has five bedrooms and a three-bedroom gatehouse for guest accommodation, was put up for sale earlier this year for offers over £795,000.

It has now been sold to an overseas trust in a £1.4m deal which also involved the purchase of other properties on the surrounding estate.

Mr Weir, 69, a retired cameraman for STV and his wife, 60, a former psychiatric nurse, converted old potting sheds in the grounds into a wine cellar and tasting room, a meeting room and an office.