Sorry to bring this one back up again, but we have a very similiar case in that a clmt who has been on Income Support for many years is about to start getting Maint payments via CSA. On top of these she will also be getting a further £5 per week which she claims are towards arrears for the many years that father has not been paying.
If we take arrears income into account for period it is being paid, this could be say 2004 to start with? this wil have no effect on HB as she was on Income Support.
I would be inclined to take into account for week inwhich any arrears are actually paid.
Any thoughts/ comments on how others deal with this income.