British Olympic team members Tina Cook and Mary King both recorded dressage scores that keeps them in three-star contention going into the weekend at the Barbury International Horse Trials.
Cook, a double Olympic bronze medalist four years ago and the 2009 European individual champion, was awarded 49.0 penalties for her dressage test on Miners Frolic.
Cook lies in 21st spot overnight, with five-time Olympian King and Imperial Cavalier 24th, but Olympic reserve Nicola Wilson is 46th on Opposition Buzz following a disappointing dressage score of 53.6.
Pippa Funnell, another reserve for Britain's five-strong Olympic team, delivered an outstanding dressage test on Billy Beware to lead section C of the two-star category overnight. The 43-year-old posted 36.1 penalties, which gave her an advantage over world number one William Fox-Pitt with his experienced Seacookie.
Fox-Pitt and his London 2012 colleagues Zara Phillips and Piggy French are among the contenders in section B when both the showjumping and cross-country phases take place on Saturday.