Hi _smiler_
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is.
Welcome to Benefits and Work .
I've moved your post to its own topic, we ask members not to post their questions in other member's topics as it can lead to the wrong advice being given or taken.
You need to contact DWP and inform them of your PHI insurance payment as you could be hit with an overpayment. Although CB ESA is based on your NI contributions and therefore is not means tested, if you are placed in the Support Group then this is means tested.
I would phone DWP ESA's enquiry line: 0800 169 0310, make sure you get the persons name who you speak to, you will need to give them the information of your PHI insurance, they may want to see documentation, ask them if they need original or copy, also confirm in a letter what has been discussed and agreed.
Gary
