Manjit is a 33 year old lorry driver who presents with nightmares and flashbacks of a road traffic accident 1 year ago. He admits that he is only presenting now as his wife says he has become increasingly irritable over the last few months and he is struggling to sleep. Manjit is angry about what happened and no longer drives at all as he gets too distressed behind the wheel. He denies feeling low in mood and has no suicidal thoughts or ideation.
In the past he has suffered from depression and required 6 months of Fluoxetine.
What is the most likely diagnosis?