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.
As in your case, the question you asked was missed for which I can only apologise.
To answer your query, our PIP MR & Appeal guide can be found below by clicking on the link, the PIP area also has template letters that you can use to make the request for a MR, the PIP guide has been updated this month.