Full details about the coaching levels can be found below:
L1, £335 http://www.triathlonengland.org/get-involved/coaching/level-1 (suitable for coaching under a club coach or level 2 / 3 coach). This is a minimum level of committment to coaching and details of the likely hours can be found on the link provided.
L2, £550 http://www.triathlonengland.org/get-involved/coaching/level-2 (suitable for taking group sessions and or supervising a level 1 coach). The requirement and committment to this level of qualification is not unsubstantial. Being in the club means that you have access to athletes who might want coaching as part of your ongoing training for this qualification.
L3, £1,260 http://www.britishtriathlon.org/ge-gb-teams/elite-teams/coaching-triathlon/level-3 (top award suitable for those seeking a career in triathlon coaching or the seriously committed)
If you do fancy becoming a coach or are already a coach and want to bring your skills to triathlon, then you are advised to visit http://www.triathlonengland.org/get-involved/coaching/find-a-course to find a suitable course from those around the country.
The BTF has also introduced a coaching hub for all coaches that acts as an online resource and provides access to some of the best coaching materials in the world. Other providers like Swim Smooth also have paid for Apps that give access to training programmes and other coaching resources for anybody.