Top horse rider Zara Phillips is expected to be among the field competing at Bicton Arena today after an extra day was added to British Eventing's competition at the East Devon course.
Bicton is staging a third day of eventing to give riders who were booked to appear in a cancelled competition at Withington Manor, Gloucestershire, the chance to compete.
A spokeswoman for Bicton said: "Withington horse trials in the Cotswolds has cancelled so Bicton is now running a third day on Sunday to enable those riders to compete.
"There needs to be 200 entries on the day to make it viable but In a matter of four hours we've had 100 confirmed entries including Zara Philips. Its a great coup for Bicton."
The course, designed by organiser Helen West and internationally renowned Eric Winter, tested both horse and rider to their limits on Friday and Saturday when Olympic champion rider Mary King, who lives near Sidmouth, and Dorset-based Sam Griffiths, who competed in the 2012 London Olympics for his home country Australia, among the riders.
Millie Dumas, from Shepton Mallet, Somerset, took the top honours in Intermediate Section B with Natalie Stevens' The Duke of Cavan.
The combination finished on a score of 32.6, combining their dressage score of 28.2 with a double clear in the show jumping and cross country phases.
Millie, 21, spoke highly of the way the course rode on the day. "It's a huge improvement from last year," she said. "There are quite a lot of questions and I think it caused its fair share of problems, which is good as eventing is all about the cross country.
Intermediate Section A on Friday was won by Tim Cheffings of Tiverton and his ride Lauditio, on a combined score of 23.5. Tim also won the Lord Clinton Challenge Cup for the overall winner of the intermediate sections.
"It is the best performance so far this season, for both of us," he said. "We were tested on the course and had to react very quickly but as long as you attacked it in the right way, it was fine."
