Huge thanks Pel.
I def think it's my Thomas, as every census has him single, either as a lodger/boarder or living with his brother. when he is a lodger the addresses are very very near where his brother and family are staying. It's just I think his brother and wife also got older and maybe were unable / could not afford to look after him.
All very sad, but i think having heard that there was a batty uncle it could be him and possibly that is why he never married

Those places all looked exceptionally grim!
