We have switched jobs since buying our flat in 2019. Our combined Household income used to be £75k, now it's closer to £130k. We overpay £1k per month through much of the pandemic and also now. Net income used to be £4400, now it's £6500. Repayment would of course increase, in fact it will go up by £500-600 but our earnings have also increased
We were in our late 20s when we bought now we are 33 and 31 so naturally our earnings have increased. Most people who managed to even raise a deposit are often in jobs where there is a career path (and opportunities for promotion) or they are from middle class backgrounds where they got financial help from family..