The team also features a number of swimmers who will appear at a major international for the first time. These include Ross Murdoch, who defeated Jamieson in the 100m breaststroke on Sunday, and Ben Proud, who broke Mark Foster's long-standing 50m butterfly record in Sheffield last week.
"Everyone has put last year behind them and things look really positive for the team," Jamieson told BBC Sport.
"It's a very different approach for Britain's swimmers this year with the trials coming so close to the World Championships but overall I'm pleased with the progress made."
The World Aquatics Championships will run from 19 July to 4 August, with swimming action in the pool beginning on 28 July.
Adam Brown, Daniel Fogg, James Guy, Michael Jamieson, Ieuan Lloyd, Craig McNally, Ross Murdoch, Roberto Pavoni, Ben Proud, Robbie Renwick, Michael Rock, Jak Scott, Chris Walker-Hebborn, Daniel Wallace, Josh Walsh and Andrew Willis.
Sophie Allen, Jazmin Carlin, Georgia Davies, Eleanor Faulkner, Francesca Halsall, Jemma Lowe, Siobhan-Marie O'Connor, Hannah Miley, Lauren Quigley, Amy Smith and Aimee Willmott.
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