The seven-year-old boy has been nicknamed the Little Knight by his parents
He stood up unaided with use of lighter splints, his parents revealed this month
Jonty Bravery, 19, was sentenced to detention for life with a minimum of 15 years
Bravery threw the then six-year-old off viewing platform at Tate Modern in 2019
The unnamed victim had travelled on holiday to London from his home in France