The products are a purchase mortgage and a remortgage both offering an initial rate of 3.29%, up to 75% loan to value with a £999 fee.
The deals are exclusive to Countrywide, Openwork and Legal & General ARs.
Graham Felstead, head of intermediary channel at NatWest Intermediary Solutions, said: “Our 18 month tracker products have proved to be very popular with the AR community so I am pleased to be able to reintroduce them.
“The prevailing market condition means that we have to actively manage our product ranges to ensure that we preserve our service standards.
“This often means acting swiftly to review and refresh deals but I am pleased that we have been able to continue to offer intermediaries a broad choice of products and maintain a good level of service for application submission and processing, thanks to the improved capability of our new web site and the hard work of our BDMs and support teams.”