It will also allow desk top AVM on the parents’ property as a way to help reduce the overall cost of the mortgage.

Buckinghamshire said it was committed to offering first-time borrowers the option of taking out a loan for 100% of purchase price with certain conditions.

Tim Vigeon, head of lending at Buckinghamshire Building Society, said: “This is a tough time for first-time buyers who already find it hard to get onto the property ladder.

“Our Family Assist Mortgage offers a solution to those who have family members in a position to help secure a loan. We also offer repayment terms of up to 40 years helping to lower the monthly cost of the mortgages.

“We are fully committed to first-time buyers and intend to keep our Family Assist product in place.”