I'm already working part time.
I have "downsized" once - in quotes because the house is actually the same size but I moved to a much cheaper area.
I have 25 years contributions/entitlement in the state pension (some is from having small children).
The interest from the money freed up day downsizing is helping me live month to month.
When my kids are all finally out of the nest I will buy a much much smaller probably one bed flat to live in with the "spare" money and rent out the house I currently live in. That will effectively be my pension.
I do have some private pesion but it's scattered and not worth much.