The stamp duty support line, which is now up and running, is exclusively available to brokers.

NatWest said it could also support customers who had been delayed with their house purchase to help them take advantage of the stamp duty holiday extension.

Brokers can apply on behalf of the customer for an existing mortgage offer to be extended for up to three months where a customer is one month from expiry of their current mortgage offer or for up to six months, in three-month increments, for new build properties.

A NatWest spokesperson said: “We have been working hard to ensure that our service offering is in line with what brokers have come to expect from us.

“We have capacity within our underwriting teams to efficiently and diligently review applications and implementing the dedicated support line is another way for us to ensure we are there when brokers need us most.”

To help make sure that our customers are ready to complete on their house purchase, the lender also created a top tips guide which brokers can download from our website to share with customers.

The number to call NatWest on is: 0345 600 0205, selecting option 2.  Lines are open from 9am – 5pm Monday to Friday.