"Our service investments reflect our commitment to saving brokers time and effort with a rapid six day turn round time to offer that will help them provide an even better service to their customers."
Newcastle's two year fix is now available at 1.99% up to 80% LTV and its five-year fix at 80% LTV starts at 2.59%.
The Society is also offering free valuation across both products, and £250 cashback on the five year fixed rate.
Steve Carruthers, Head of Mortgage Distribution at Newcastle Intermediaries, said: “We’re further improving these two competitive mortgage products, which now offer cost saving advantages and the opportunity to fix at a competitive rate. Alongside this, our service investments reflect our commitment to saving brokers time and effort with a rapid six day turn round time to offer that will help them provide an even better service to their customers.”