British Para-Swimming is opening a new centre at the Manchester Aquatics Centre.
It includes a training camp for top swimmers including Ellie Simmonds and Josef Craig.
Athletes say it will be a world leading performance centre.
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Health workers visiting Manchester have offered to pitch in to help care for those injured in an explosion at a concert in the city.
If it is confirmed as a terrorist incident, the Manchester blast would be the deadliest attack in Britain since the July 7 bombings in 2005.
US pop star Ariana Grande has said she is "broken" following the suspected terrorist attack at Manchester Arena, adding: