The Grenfell Tower disaster has caused an “unprecedented” mental health crisis, a leading doctor said yesterday.

Since the June 14 fire in west London, a total of 457 adults have been diagnosed as in “urgent need” of treatment for post-traumatic stress disorder (PTSD), while 39 children are receiving specialist mental health care, NHS data shows.

Survivors and witnesses are considered to have a 50 per cent chance of developing the disorder.