God Save The Queen blasted out after Fox-Pitt, riding Chilli Morning, roared back from second place after the dressage class to claim overall victory after clear rounds in the cross-country and show jumping.
Having watched compatriot Pippa Funnell aboard Or Noir de la Loge take the lead in the dressage, Fox-Pitt recovered to reclaim his overnight lead and secure a seventh success at the Bramham Horse Trials.
New Zealander Mark Todd followed Fox-Pitt's lead and, having placed fifth after the dressage, rode the remaining two disciplines perfectly to grab second place with Leonidas II.
France's Didier Dhennin on Opi De Saint Leo, 14th after the opening round, came in third.
“If you go into any three-day event on the last day and you are in the lead then you feel the pressure,” said Fox-Pitt.
“It’s equally nerve-wracking if it’s win number one or win number seven – you don’t want to throw it away or do something silly and I knew that it was tight whereas last year I had a bit more in hand."
Britain dominated the rest of the field, with home riders occupying the remaining places of note; Paul Sims/Calador, Nicola Wilson/Annie Clover, Michael Owen/The Highland Prince, Jeanette Brakewell/Let’s Dance and again Nicola Wilson with Beltane Queen followed the podium places.