I was on ESA for a while mainly due to the traumatic experience for PIP and the reassessment and appeal that I had to go through. I have returned to part time work. Do ESA tell PIP I have went back to you.
I answered this question in a previous post you posted yesterday.
There is nothing to stop you claiming PIP if you work providing you meet the criteria. I know many people who claim PIP and work. You can get Personal Independence Payment (PIP) whether you’re working or not www.gov.uk/pip/eligibility. If you condition has improved to allow you to work, then you must inform the DWP.
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems