Hi Sassy
You must let the DWP know about any changes in your circumstances, such as changes to your wages, hours or who you work for. I would let DWP once you have received your last payslip, they may ask you why you have stopped, if they do all you need to say is that it affected your mental health.
We do have a 7 page guide on permitted work: Permitted work and working while on universal credit due to sickness or disability. A guide to doing permitted work whilst claiming ESA, universal credit or incapacity benefit.
www.benefitsandwork.co.uk/guides-for-claimants/esa, it is the second link down.
Gary
