Jacob is 30 years old and attends the GP surgery for a routine medication review. You note he has recently been seen by the Psychiatry team for Depression and that they are suspecting he has a personality disorder also. You are aware he is a perfectionist and gets preoccupied checking details in all tasks. He has recently turned down a promotion at work as he is worried about making a mistake. Jacob strongly dislikes his daily routine to be disrupted.
What is the most likely diagnosis?