When talking about relative poverty, the figures aren't that meaningful anyway. Because of the way it's defined it's almost impossible to completely eliminate relative poverty and bizarely the easiest way to reduce relative poverty is to reduce the income of richer people, which actually happened after the financial crash - relative poverty reduced even though the poorest did not get any richer.
Eg If one person has £100k and the other two people have £200k, the first person is in relative poverty, even if the cost of living is £50k.
If three people have £10k there is no poverty, even if the cost of living is £30k.