I knew I meant to post this weeks ago and totally forgot, it was only posting about DLA I remembered. A friend who works for the CAB told me that 3 people in their patch have been prosectuted recently for claiming higher rates of DLA than they were entitled to. One used as his defence that he had read on a support forum (not this one but he did have a lung/breathing related problem) to fill in the form using his worst day. He did this and got awarded highter rate care and mobilty but his worst days are only about 6 days out of every month and he was rumbled when someone saw him up a ladder fixing his roof and they videoed it and sent it to the benefit fraud people, he got a criminal record and his benefit was down rated to low care and mobility.
My friend says do it by percentage if your bad days are over 50% of the time then use them if they are less than that use a middle of the road day. There are nosy people out there who will see a car with 0 paid on the tax disc and will know that means higher rate mobility if they see you walking to the shop 2 or 3 times a week they are going to report you, you then will have everything you have said on your claim form gone through with a fine tooth comb and expert evidence might be sort. In the worst case scenario a prosecution will happen and that means a criminal record. So be sensible folks.