Dedicating time to build his fitness and preparation ahead of the 2016 season, Olli then took on a second campaign of karting on a European Championship level in the Junior Rotax Class, racing for the KR Sport Racing Team.
Beginning the 2016 season in fantastic form, Olli showed immediate pace from the outset at the Rotax Winter Cup in Valencia. He came agonisingly close to winning the Winter Cup, where a questionable defensive tactic unfortunately cost him a shot at winning.
His strong momentum continued throughout the season, scoring numerous pole positions, heat wins and podiums on his way to taking 3rd overall in the Junior Rotax Euro Challenge Championship - earning himself a coveted ticket to the Rotax World Finals.
Alongside his karting campaign, Olli made his first venture into car racing as he joined forces with JHR Developments to race in the Ginetta Junior Championship, a support series to the British Touring Car Championship.