"For any officer, commanding paratroopers is a daunting prospect.
'BEST OF THE BEST'
"The pressure is huge because the regiment's standards are so high – and if an officer is not cutting it the blokes won't respect them."
The source went on to say how the role will take a lot of courage and composure but that Sandhurst chooses the "best of the best".
"To be the first woman to find herself in this role, that's going to take a lot of courage and composure on her part," the source said.
"Only eight cadets from scores who applied were invited to interview and Hannah is one of five to go forward from there."
The Parachute Regiment was formed in World War II under a decree from Winston Churchill and has been in action since.
Nicknamed the "Red Devils" by the Germans in North Africa, the soldiers have done stints in Normandy, Afghanistan and the Falklands.
To date, only one woman has passed 'P Company' which is the toughest military selection outside the Special Forces.
Captain Rosie Wild, then 28, of the Royal Artillery was presented with her beret last year.
In 2018, the Defence Secretary announced that women could apply to any role in the military.
The then secretary Gavin Williamson revealed that women already serving in the Army are able to transfer into infantry roles - including the Special Forces.
The Royal Armoured Corps was the first ground close combat branch to open its doors in November 2016 to female soldiers and officers, followed by the RAF Regiment in September 2017.
280 paratroopers jump onto fields at Sannerville, Normandy, as part of 75th D-Day anniversary commemorations