Most inequality in the UK is because rich people are getting much richer. But the poor people aren't getting poorer, they're getting richer too. Standard of living for poor people has increased hugely over the last 50 years.
I'm not sure about the last fifty years, but I was referring to the last 30.
Certainly in recent times, absolute poverty is greatly increasing. As more people have their welfare payments withdrawn, I think we can expect to see this increase to continue. In the UK we are dismantling the welfare state, which has resulted in over a million people using food banks annually. The poor are not getting richer.