Yeap that's true Scotsfiancee, these benefits are not applied for those who are subject to Immigration Control.
However, if your partner i.e either ILR or British Citizen can be entitled to these benefits.
i.e you as a 'no recourse to a public funds' status and your partner holds a ILR or British Citizen (or either way) and have a dependant child is automatically entitled to Child Benefit (£17.45 p.w. for eldest child).
Or
you as a 'no recourse to a public funds' status and your partner holds a ILR or British Citizen (or either way) and in a low income can claim a Working & Child Tax credits and/or Housing & Council Tax Benefits.
If you live with your partner the claimant must put your details on the forms and this doesn't mean you are going to claim benefits too. No! your partner is the one who is claiming a benefit not you, it's the law that the claimant must declare to the benefits office if he lives with partner or not, either you are subject to Immigration Control or not..