Brother and sister purchase flat 50:50 from their own funds in 2009 200K. Property is let to various parties until 2014 - where it is occupied by sister. Brother moves overseas to Canada and resides there from 2015 and remains there . Sister pays no rent. I get there is PPR for the sister for the period from 2014- can i rebase the property? As there is no rent paid by the sister is there any relief for the brother ?