Tyler Butterfield made a surprise return to Island competition yesterday, romping to victory in the Tokio Millennium Re Triathlon in Hamilton as he continued his preparation for this summer’s Olympic Games.As would be expected the professional triathlete, who booked his ticket to London last month, left the rest of the men’s field in his wake, covering the 750 metre swim, 20k bike and 5k run in a combined time of 56 minutes and 15 seconds.Kristyn Tobey-Robinson also had everything her own way to capture the women’s title.Butterfield, who will join Bermuda’s other pro triathlete Flora Duffy at the Olympics, used the event as more than a warm-up for the Games.“I went pretty hard and didn’t mess around, it was training for London,” said Butterfield, making his first appearance on local shores in nearly two years.“I went hard from the gun.“There were a couple of times in the swim I wanted to slow up a little. But I thought myself . . . ’no, don’t’, because this is training for London and everything counts. Physically I went as hard as I could.”Butterfield became the seventh local athlete to qualify for the Games after finishing 25th at the ITU World Triathlon Madrid in Spain.Since then he has been keeping himself in pristine shape at his Boulder, Colorado training base but saw the chance to return home as another step in his final preparationsHe also took the opportunity to get reacquainted to competing at sea level in front of his home fans.“In Boulder we live at a mile high altitude and we actually go on oxygen to bring us to sea level so that’s why I went pretty hard,” he added.Earlier this year, Butterfield claimed a maiden victory as a professional at the ITU La Paz PATCO Pan American Championships in Argentina.Yesterday he completed the swim in 10.02, bike in 29.26 and run in 15.49 to finish more than five minutes ahead of nearest rival Jonathan Herring (1:01.23).Neil De Ste Croix (1:03.23) rounded off the top three in the men’s field.Meanwhile, Robinson won for the second straight year in a time of 1:07.38.She covered the swim in 14:08, bike in 32:05 and run in 20:03 to finish nearly four minutes ahead of second-placed Laurie Orchard (1:11.03).Emma O’Connell (1:13.24) rounded off the podium finishers in the women’s field.“I was pleased with my performance,” Robinson said. “It was hot out there but I like the change of course from last year because it’s flat and you can open it up more on the bike and just go for it.“It was definitely warm. I could even feel it on the bike and heading into the run, so it was nice that it was a short sprint today and not anything longer because it’s hot.”Like Butterfield, Robinson used yesterday’s triathlon as a warm-up for an upcoming overseas event.“I’m using this as training for a Half Ironman event in Rhode Island in a month and so it worked out well,” she said. “My preparations seem to be paying off.”