Jenni Falconer presents coverage of the Leukaemia and Lymphoma Research Blenheim Palace Triathlon, with thousands of elites, enthusiasts and celebrities enjoying the scenic course which is set in the historic birthplace of Sir Winston Churchill.
 

In the opening round of the prestigious British Triathlon Super Series, defending champions Mark Buckingham and Emma Pallant compete against some of triathlon’s rising stars. Other highlights include a team of Holby City actors pitting themselves against the Blenheim course and three Formula One teams going head to head in a triathlon challenge.
 

The race will be on Channel 4 this Saturday 27th June at 06.35 am or Channel 4 +1 at 07.35

If you miss it - catch up on 4OD. 
 

Also showing on Sky Sports and British Eurosport in the next few weeks.