The 24-year-old hit top form last year as she romped to Commonwealth, European and British titles in the 800m freestyle, as well as European and British gold and Commonwealth silver in the 400m – lowering her Welsh records over 200m, 400m and 800m freestyle over the course of the season as well.
But there is no time for Carlin to rest on her laurels with the World Championships and Rio Olympic Games looming over the horizon, and first up is the British Swimming Championships at the London Aquatics Centre this week.
And with the Championships doubling up as the trials for this summer’s World Championships in Russia, Carlin insists she is up for the challenge.
“Last year was an incredible year for me and I was over the moon with how I swam then, but obviously it is now about moving that forward the next couple of years and building on that,Ã¢â‚¬Â she said.
“With my coach moving away last year I had to relocate programmes, so I’m still getting used to the change but I’m really looking forward to trials and hopefully it will be a good event in London.
“It’s the Olympic pool, so it’s an incredible venue and just swimming there will be great. Hopefully there will be a good crowd in there as well.
“The British Champs are always a great meet. When you’re racing the best in Britain you’ve got such great talent there.
“The trials are all about trying to qualify for the World Championships, and the times that British Swimming have put out are really tough times this year.