Burnell will join in the mass - participation one - mile swim on Saturday 24 September alongside thousands of fun - swimmers and charity fundraisers .
Burnell was in contention for a medal in the 10km marathon swim in Rio before a late disqualification .
Burnell , who was in contention for a medal in the 10km marathon swim in Rio before a late disqualification , will join in the mass - participation one - mile swim on Saturday 24 September alongside thousands of fun - swimmers and charity fundraisers .