Phil Warren being attended to by ambulance crew after landing in Swansea. See SWNS story SWLNhypothermia; A dad-of-two has become to first person evefr to swim across the Bristol Channel using only breaststroke despite suffering with severe hypothermia during the crossing. Phil Warren, 52, has completed three crossings of the Bristol Channel this year, and has become to first person to complete a crossing using only breaststroke. During his most recent crossing from Ilfracombe to Gower, Phil was in the 18-degree water for just under 22 hours and suffered with severe hypothermia which saw him rushed to hospital. Despite the setbacks, Phil completed three of his four planned crossing with one being cancelled due to poor weather conditions.