Who are we?

T3 Triathlon was born out of a passion for triathlon, and all things endurance.

Our goal at T3 Triathlon is to provide a holistic approach to the coaching we provide to each and every athlete. Yes, the coaching plan and training of course is important and valuable. However, we would argue that the contact/relationship you have with your coach is as, or if not more important.

  • Mark Threlfall - Founder

    T3 was setup by ex-professional triathlete, Mark Threlfall, who competed at numerous European and World Championships at an elite level for Great Britain, before moving on to a successful long-distance triathlon career.

    T3 begun as a hobby for Mark, as he enjoyed helping others embark on their own triathlon journeys. A number of years on and this “hobby” has become a coaching setup, a fun and friendly community, and a well established team.

  • Harry Palmer - Coach

    Since these early days, Harry Palmer, has joined T3 as a coach. He is a qualified BTF Level 2 Coach, and also an accomplished triathlete himself.

    In 2018 he was the fastest Age Grouper overall in Ironman 70.3 Staffordshire and Ironman 70.3 Weymouth. This gave him the confidence to step up to racing professionally in 2019. This journey has been a huge experience for Harry, that he documents through his YouTube channel.

  • Will Crudgington - Coach

    From his introduction to triathlon, Will has been part of the T3 family and now joins as a BTF Level 2 Coach.

    Since 2016, Will has regularly and successfully represented GB over various distances at Elite level. He has recently been competing in off-road (Xterra) triathlon events and showing his range of skills against some of the best in the world. Will looks forward to helping others in the same way T3 has helped him.