Leofwen
Unless the Tribunal made a Mobility award, irrelevant of whether it was payable or not then you will have to report a Change of Circumstances, be aware that doing so will result in a full reassessment of your claim and the resulting Decision will supersede your current award, whatever it is.
If you do report a Change then do so in writing and if you can afford it send the letter by a Tracked post so that you have proof of delivery, the letter should set the date that any new award applies from.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
