Hi Steve
There is always a risk if you go for a Mandatory Reconsideration that you could lose part of your award, however, a lot of people still go for an MR. Only you can make the decision. If you believe you should have been awarded something for mobility and you have the evidence to back it up - then you might decide that's what you want to do.
You can read more about it in our guide - scroll down the page to PIP Appeals
www.benefitsandwork.co.uk/help-for-claimants/pip Citizen's Advice Bureau - help with paperwork. Otherwise, you will need to google benefit advisors in your local area.
BIS