Food bank network Trussell has developed term to define deep poverty – but what does it mean, who is affected by it, and why?

• More than 9 million Britons vulnerable to reliance on food banks, research finds

A study by the UK’s biggest food bank network, Trussell, estimates one in seven of the UK population are struggling in a category of deep poverty it calls “hunger and hardship”. But what does it mean, who is affected by it, and why?