Fidelity Investments has decided that this year’s event (12-15 September) will be its last after four years’ involvement.

Blenheim event director Mandy Hervieu said: “The team at Fidelity has been a great bunch to work with and has put a lot of investment into the event.

“This has allowed us to enhance the facilities we provide for our various stakeholders. The team has been a super partner and we will all miss its involvement.

“However, one must be pragmatic — all good things do come to an end and we have had four great years.”

Mark Till, head of Fidelity Personal Investing, said: “We wish the team at Blenheim and British Eventing every success for the future.

“We have really enjoyed the experience of working with Blenheim. The focus on the customer and a determination to be “best of class” has meant this has been a successful partnership.”

Mandy added: “Blenheim Horse Trials offers partners the opportunity to showcase their products and services to a very attractive profile audience of around 60,000 visitors and  align themselves with top-class sport and the brand values of horse trial, the Palace and the event.”

Interested companies should contact sponsorship@blenheim-horse.co.uk