How to qualify for two bedroom

It's extremely difficult to be housed with social/council housing for more bedrooms than you need because this would be under occupancy.

If you're living in social/council housing then local housing allowance (LHA) doesn't apply. With a bedroom place you would be entitled to all of your rent paid. If you had a spare bedroom then the bedroom tax would apply and your housing element would be reduced by 14%.

LHA only applies if you're privately renting.

You seem rather confused. If you're privately renting then you can have as many bedroom as you want but you need to pay any shortfall of rent yourself. You're only limited with the bedrooms if in social housing. However, it may not be easy to find a landlord that will accept someone claiming benefits because the majority of the time they just refuse. If you're lucky enough to find one they may ask for a guarantor.

For an extra bedroom entitlement with housing element of UC then if you need regular overnight care you maybe able to claim an extra bedroom. However, a decision maker for UC will not be able to make a decision on that before you move house. You would need to wait until you're living in the new property before you can put In a claim.

For bedroom tax, this applies to social/council housing tenants if they have a spare bedroom and yes it applies to housing element of UC.

Have you put your name down on the housing list for social/council housing?

Are you also aware that a section 21 doesn't mean you have to move out by that date. A landlord can't evict you, only a court can do this. Please make sure you have somewhere to live before moving out. If you move out without somewhere to live your local authority may refuse to help you for making yourself homeless.

The last sentence in this comment, the only issue here is that this isn't possible because UC can't accept a change of circumstances before it happens.

Do you have a shortfall of rent where you're living at the moment? It doesn't matter that they don't know you live in a 2 bed flat because they didn't need to know anyway. It won't be backdated but it maybe possible to claim for your current flat going forward, at least until you move out. When you move out into your next place you will need to make sure you claim the extra bedroom then as well.

For the housing register where you used to live, do you have a local connection to that area? family, friends? If so then you maybe able to add you name based on that. If you don't whether they would add it based on potential homelessness, I don't know, you would need to speak to them to ask. All local Authorities for social housing have their own rules.

I'm a little confused why you said your rent was £1,300 when It was £1,600. Did you provide a tenancy agreement because it would usually say on this how much your rent is. If your housing element doesn't cover the whole rent amount anyway even at the lower amount then it doesn't matter. However, you should always be honest and tell them exactly how much rent you're liable for.

For an extra bedroom for a carer LCWRA is irrelevant. It's your daily living part of PIP that could qualify you for this. Living alone is also irrelevant.