Back Dated PIP

We asked for the DWP to look again at a decision they made on my husbands PIP award. This was because of the change in the law which meant that some people who had been scored 2 on the social engagement with people question were now eligible to score 4 points. The DWP agreed that my husband was effected and the change in the points from 2 to 4 meant the difference between the standard and higher rate of daily living on PIP.

This means we will receive a back dated amount of PIP and I wanted to know whether this will affect our UC in terms of having over £6000 and whether this will be counted as savings and affect the our UC award?

Thank you in advance

Clara