The controversial Church of Scientology has donated £50,000 to the Sussex Air Ambulance Service at a glitzy gala hosted by a Hollywood star.

Actress Kelly Preston, wife of John Travolta, compered the event at the church’s headquarters in Saint Hill Manor, East Grinstead, in front of 1,500 people.

Ms Preston is a keen supporter of the religion, which was founded by L Ron Hubbard in 1953.

Sussex Air Ambulance Service provides helicopter cover for the county, as well as for Kent and Surrey, attending an average of four incidents every day.

The charity is funded entirely by donations and provides a team of doctors, paramedics and nurses. Its chief executive, Dave Philpott, was invited on to the stage alongside staff and crew to accept the cheque from Ms Preston and Bob Keenan, director of the L Ron Hubbard Foundation.

Delaine Shearman, the Sussex fundraiser for the charity, said: “The £50,000 raised will enable 50 possible life-saving missions.

“The Sussex Air Ambulance is grateful for these vital funds that will help keep our helicopter operational.

“Everyone should be very proud of themselves.”

Mr Keenan added: “The L Ron Hubbard Foundation and the Church of Scientology are delighted to give their support to the Sussex Air Ambulance as our chosen charity for this concert, which each year is the highlight of our charity fundraising events and activities.

“As any help the Sussex Air Ambulance receives enables their teams to save more lives, many people pulled out all the stops so we could give this donation.

“Our warm thanks are due to all those contributors.”

The gala concert concluded a weekend of activities, attracting more than 7,000 people from across the world.

Representatives from embassies including Cameroon, Bulgaria, Vietnam, Fiji, South Africa and Liberia were among the crowd.