Sky Academy Sports Scholar Siobhan-Marie O'Connor is part of a 29-strong squad for the FINA World Swimming Championships in Budapest.
The squad features Olympic champion Adam Peaty and Olympic medallists Jazz Carlin, O'Connor, James Guy, Duncan Scott, Stephen Milne and Chris Walker-Hebborn.
They are joined by a group of emerging younger swimmers with some making their senior international debut.
O'Connor won three silver medals at the British Championships in Sheffield last week after seeing her hopes of winning the 200m individual medley - the event she claimed Olympic silver in last summer - dashed by a wobble on the start that led to a disqualification after easily winning the race.
O'Connor, supported as a Sky Academy Sports Scholar since London 2012, said: "I'm so pleased to have been selected to represent Great Britain at my fourth World Longcourse Championships.
"On reflection, I'm really pleased with my swims at the British championships, with the training that I have done since Rio.
"I had a massive break after the Olympics which I really enjoyed. I got back into training properly after Christmas, and I feel in a great place to start my preparations for the summer.
"I'm really looking forward to competing with the team again and It's great to see so many young athletes coming through. I'm very excited to start the next four-year cycle to Tokyo."
Head coach Bill Furniss said of performance levels at Ponds Forge: "The selectors were pleased that so many swimmers achieved the qualification or consideration time.
"We set difficult standards but these reflect what we're trying to do in British Swimming and what is required to be successful. To see so many swimmers achieving these times is very encouraging.
"The high number of records achieved last week didn't surprise me. If we are to compete on the world stage you have to show continual improvement and that is what we saw at the championships.
"We've already got one eye on Tokyo and therefore we want to introduce that next generation of elite swimmers to world class arenas.
"They did a good job in putting themselves forward but now the work starts again as we build towards the World Championships in Budapest in July."
Great Britain squad: Freya Anderson, Charlotte Atkinson, Jazz Carlin, Georgina Davis, Kathleen Dawson, Nick Grainger, Luke Greenbank, James Guy, Hollie Hibbott, Max Litchfield, Calum Jarvis, Daniel Jervis, Hannah Miley, Stephen Milne, Ross Murdoch, Siobhan-Marie O'Connor, Adam Peaty, Ben Proud, Molly Renshaw, Rosie Rudin, Duncan Scott, Mark Szaranek, Alys Thomas, Jocelyn Ulyett, Sarah Vasey, Chris Walker-Hebborn, James Wilby, Aimee Willmott, Abbie Wood