I'm at that phase now.
To qualify you would need to be in that council's spot for a minimum of six months, and if you want to be housed, you would need to be housed. I know this sounds stupid, but it is the way the system now works. You need to be at an address to get an address. Even then the address you are at would have to be unsuitable for good reason. Eviction is a good reason.
If you apply from a movable boat that has been in the area for more than six months, you could be housed fairly immediately, as local councils do not accept movable boats as legitimate 'homes'. You would be declared 'Homeless. Living rough'.
However, their obligation is only to give you 'shelter' and that is where you would end up; in an hostel or homeless shelter for six months, so that you can get a local address, and then qualify for a local address!
I wouldn't recommend this route to anyone, unless you would be happy sharing accommodation with alcoholics, street drinkers, drug takers and those needing care in the community because they were booted out of mental hospitals so that Maggie Thatcher could asset strip the land they were built on.
Tone