You must pre-book your picnic(s) directly through the Blenheim Horse Trials website.
To Order Picnics: https://www.bpiht.co.uk/enjoy-your-very-own-fortnums-hamper-at-blenheim-palace-international-horse-trials/
You cannot order Blenheim Horse Trials picnics on the Fortnum’s website or in a Fortnum's store. The picnics cannot be amended in any way.
If you have any questions about the picnics, please contact our Concierge team (Monday - Friday, 9am - 6pm) at Concierge@fortnumandmason.co.uk.