Firefighter Piers Vallance from Great Holm Fire Station in Milton Keynes has become the Emergency Services Triathlon National Champion.
He took the title on Friday at the National Watersports Centre in Nottingham.
Piers’ wife Claire was also competing and led the women’s field from the start to win. Both were part of the UK Fire Service team that took the overall title.
Piers said: “This is the first time the fire service team has won in many years, which made victory even sweeter.
“The temperature of the lake, a lowly 15 degrees, made for a chilly, numb and breath-taking start! The bike and run course were generally flat, but some strong headwinds and tight corners made the bike course more challenging.
“It was also a tactical race where you could see your opponents at all times.”
The triathlon was open to all emergency and associated services, including police, fire, ambulance, mountain rescue, coastguard, lifeboat, air ambulance and armed forces.
“It comprised a 750m open water swim, followed by a traffic-free 20km cycle and a 5km run to finish.
Piers had a good swim and exited the water in fourth place, but after a strong bike leg he moved into second. He then produced the fastest run of the day to take the win.
He was the only athlete to beat the hour barrier, completing the course in 59 minutes 15 seconds.
The prize money for winning team goes to its chosen charity, The Fire Fighter’s Charity.
Piers has thanked Buckinghamshire Fire Service Sports & Athletics Association for its continued support.