Amid a punishing cost of living crisis, many Britons are sitting on a remarkably large store of wealth – if only they could get at it. The total value of homes in the UK was £8.7 trillion by the end of last year according to estate agent Savills, but Bank of England data shows that outstanding mortgage debt came to only £1.7 trillion. In other words, ostensibly cash-strapped Britons actually own around £7 trillion of housing wealth. Selina Finance, a new entrant to the UK’s mortgage market,...