Is 85 too old to move?

Letter of complaint to the HA who should have a complaints procedure anyway, copies to Police, MP, Councillors, Environmental Health.
Citizens Advices will help you write the letter, they have templates.
The tenant is responsible for the behaviour of their visitors.
You are entitled to a quiet enjoyment of your tenancy.
HA in breach of Contract (Tenancy Agreement)
Keeping a diary is essential, take pics, if you open Video
on your phone you can record sound too
Good luck OP its hell I know, been there.

There is a site, online, curiously enough, called
Neighbours from Hell which you may find enlightening.

Where have you gone Nannakins?
You've had a lot of sound advice, do you intend to take it?

Please report to the police if you think there is drug dealing in your neighbourhood - there is currently a national initiative to disrupt this activity (please ensure this is anonymous, use crimestoppers.uk.org)

Also, do not let age be a barrier, if you would like to move, then move to somewhere you will be happy 💐

If you suspect the neighbour is dealing drugs from his rented property, you have a way to get him evicted, then you won't need to move. His landlord will get rid .

You can report this completely anonymously to

<https://crimestoppers-uk.org/give-information/forms/give-information-anonymously>

Crime stoppers forward it to police. There is absolutely no risk of the tip-off ever being linked back to you.

I think Nankins has moved

If you move to private rental you will lose the security that HA offers. Private landlords can give you notice when they decide it suits them.

My parents lived in a social housing flat, not an age specific one but they rarely had problems until Social Service moved in a 17 year old boy. Loud music, constant stream of young visitors, definite smell of pot in the stairwell, etc. Everyone complained to the HA and eventually he was moved out. So it is worth getting your neighbours to complain too and hopefully will prove much more disruptive to your life. Good luck.

If the tenant is paying rent it is possible with patience, to get them moved. You need to contact either the council or police who can advise on keeping an incident diary and how to report issues. Even better if you can get other tenants to do the same.
I and lots of neighbours had issues with an unsociable neighbour a while back. She was moved after we all produced incident diaries and constantly reported issues. Don't feel you have to move as you could end up worse off.

if you move there is always the chance that the same thing will happen again in your new accommodation. I knew someone that that happened to - and they had a move arranged by the HA to another HA house.