Thank you all for your friendly advice and information.
I see now that it is not straight forward and could be loads of hassle. The DWP would still pay JSA to me but I would be classed as no fixed abode. I foolishly thought that I could move the boat as CCer, say every 11 days to another parish. Here in Yorkshire one does not need to go too far to be in another area classed as a different county, for example...Midfield comes under Kirklees, Halifax under calderdale and Skipton under Bradford. After that one enters Lancashire.I would only be about 15 miles from the job centre I use at the most, Rochdale in Lancashire is only 15 miles from where I live. So I was thinking area-A 11 days stay, area-B 10 days stay, area-C 12 days, area-D 5 days and then back to area A.
I was thinking that if I got the boat and pay license keep moving the river trust would leave me alone. For heating I could use one of those heaters that take the gas bottle in the back, I am hardy I don't have heating on in my house because I can not afford it.
I can do loads of jobs myself on the boat including engine service and repairs.
When I said about staying put, I meant if I found a job say in Lancashire, I would then look for a residential mooring.