A thrilling Cayenne Puissance at Olympia saw Guy Williams and Mathieu Billot joint winners, after clearing an incredible 2.23m (7ft 4in).
Four riders took on the massive wall in the fifth round, however only Guy (Mr Blue Sky) and French rider Mathieu (Dassler) jumped clear.
Young rider Alfie Bradstock (H.d’Or) and puissance specialist Karline de Brabander (Fantomas de Muze) also reached the final, but Alfie hit the wall and Karline suffered an unfortunate fall.
The wall was at its highest since 2006, when John Whitaker, Robert Whitaker and Markus Fuchs shared first prize.
This was Guy’s third consecutive puissance win with Mr Blue Sky. He tied once again with Mathieu in a puissance in France four weeks ago, where they cleared 2.26m.
Guy also shared first place at Horse of the Year Show with Alfie Bradstock (H D’Or) over a height of 2.16m.
With his incredible talent over big fences, Guy thinks Mr Blue Sky could be a record breaker. The Westphalian has been brought on slowly because of his size and he has had some dressage training to calm him down.
“He makes it look easy but he’s actually quite sharp and nervous and he becomes strong to ride,” said Guy.
Don’t miss Olympia 2018: Puissance when it premieres on Horse & Country on 8 January at 9pm.