Notarzied or certified.

[joebloggs]

Another question guys

My parents house is a council owned house so what can be used as proof that they are the legal tenants? Would a rent and council tax bill be enough? or will they need more?

Thanks.

i think UKBA will need a letter from the council stating its ok for your wife.gf to live there, they might come and inspect the property..

[Terpe]

i think UKBA will need a letter from the council stating its ok for your wife.gf to live there, they might come and inspect the property..

Yes that's right. The local council will need to provide written permission.
May I also suggest you ask the council to confirm the adequate (per post #6). They may do it free if you lucky, or they may want to charge for it or you just confirm with your own photo's and evidence etc.