Allybally
If you Google means tested benefits you will see that Wikipedia lists all those that you may need to declare on. They were all updated in 2013 and include income support.PIP is not a means tested benefit but you do have to advise DWP for other circumstancial changes, the leaflets you get sent with payment information gives all the information. If you cannot find them follow Lyn's advice and call CAB to check with them.
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Mo