The MP for Brentford and Isleworth called on the Justice Secretary "to do the right thing" on Tuesday (April 25), after a judge previously ruled doctors at Great Ormond Street Hospital (GOSH) could withdraw the eight-month-old's life support treatment.
However the politician's plea to help save Charlie's life fell on deaf ears as she was told the "judgement should be respected" in this case.
On April 11, a High Court judge ruled Charlie, who suffers from a rare mitochondrial condition, should move to a palliative care regime and be allowed to "die with dignity".
Parents Connie Yates and Chris Gard, of Bedfont , wanted to take their son to the US for a treatment trial.
They said they wanted to challenge the High Court ruling in the Court of Appeal.
Meanwhile doctors will continue to provide life-support treatment until appeal decisions have been made.
On behalf of MP Seema Malhotra and herself, Ms Cadbury urged ministers to "have it in your heart to look into the case of Charlie Gard", adding he is "legally unable to leave GOSH so he can get treatment in the US that might just save his life".
She said: "It's a complex legal case but if the Justice Secretary has any powers to intervene I plead with her to do the right thing".
A fundraising appeal has to date has raised £1.3m to pay for the little boy's treatment in America.
It's a complex legal case but if the Justice Secretary has any powers to intervene I plead with her to do the right thing".
Justice minister and Bracknell MP Phillip Lee said, while this "case is particularly emotive" as he understands it "clinicians at GOSH have made a judgement in this case and I think that should be respected".
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