Raising money for the NHS Trust was special, she said, and she hoped it could “improve patient outcomes and working conditions for colleagues”.
She added the SwimTayka charity was also important to her because she felt “privileged in terms of being able to swim”.
“I’ve come across so many people who can’t swim, and actually adults as well,” she said.
“It’s great they’re teaching kids in undeveloped places how to do it – it’s a great charity to be involved in.”
Suzy Brain England OBE, chair of the board at DBTH, said: “Ellie’s determination and commitment, both in her clinical role and through this extraordinary fundraising challenge, are truly inspiring.
“On behalf of the board, we are incredibly proud of Ellie and wish her and the Riptide Racers every success as they take on the English Channel.”
The team will be on standby to swim between 11 and 18 July, with the exact day being chosen based on the swimming conditions.