The hospital treating Charlie Gard would consider any offers or new information relating to the “wellbeing of a desperately ill child”, Theresa May said.

The Prime Minister’s comments came after US president Donald Trump and the Pope tweeted their support for the boy, who has been at the centre of a lengthy legal battle involving his parents and doctors at Great Ormond Street Hospital (GOSH).

Mrs May told MPs: “It is an unimaginable position for anybody to be in and I fully understand and appreciate that any parent in these circumstances will want to do everything possible and explore every option for their seriously ill child.

“But I also know that no doctor ever wants to be placed in the terrible position where they have to make such heartbreaking decisions.”

The parents of Charlie, Chris Gard and Connie Yates, lost a legal battle to take the 10-month old to the US for experimental treatment.

Mrs May said: “I am confident that Great Ormond Street Hospital have and always will consider any offers or new information that has come forward with consideration of the wellbeing of a desperately ill child”.

Boris Johnson has told his Italian counterpart it is “right that decisions continued to be led by expert medical opinion, supported by the courts” after the Vatican’s paediatric hospital offered care to terminally-ill Charlie Gard.

Boris Johnson spoke to Italy's Foreign Minister Angelino Alfano about Charlie Gard's situationBoris Johnson spoke to Italy’s Foreign Minister Angelino Alfano about Charlie Gard’s situation (Dominic Lipinski/PA)

Foreign Minister Angelino Alfano raised the offer made by the president of the Bambino Gesu hospital in Rome, after Pope Francis called for Charlie’s parents to be allowed to “accompany and treat their child until the end”.

The pair discussed the case of Charlie, who has been at the centre of a lengthy legal battle involving his parents and doctors at Great Ormond Street Hospital (GOSH), during a phone call on Wednesday, the Foreign Office said.

A Foreign Office spokeswoman said: “Foreign Secretary Boris Johnson and Italian Foreign Minister Alfano held a long-scheduled telephone call today to discuss a range of foreign policy issues.

“They covered the UK proposal for EU citizens’ rights post-Brexit, migration, Afghanistan, and the upcoming Western Balkans conference being chaired by Italy.

Ribbons tied to trees outside Great Ormond Street Hospital backing a campaign to allow Charlie Gard to be treatedRibbons tied to trees outside Great Ormond Street Hospital backing a campaign to allow Charlie Gard to be treated (Brian Farmer/PA)

“Minister Alfano also raised the case of Charlie Gard and the Pope’s recent offer of treatment in Italy.

“The Foreign Secretary said this was a deeply tragic and complex case for all involved, and said it was right that decisions continued to be led by expert medical opinion, supported by the courts, in line with Charlie’s best interests.”