CC
Welcome to the forum
In case you are not aware, your real name appears to be showing in the forum, if you want to change this then follow the instructions in the following FAQ
My full name is showing, how can I stop it?
If the amount is small, then it may be because the amount of the mortgage has been reduced over the preceding year and the DWP have re-calculated the their payments, however if it is large or you are not happy with the amount then you will have to contact the DWP for further information.
Gordon