Attach Nighthawk Wifi Router to BT Wifi Router (inc modem)

At present I have an ADSL modem supplied by BT which is then connected to my Nighthawk wifi router. I have a BT modem/wifi router which I'd like to put in front of the Nighthawk router to provide 2 wifi networks etc but the Nighthawk would be physically connected (using a CAT6 cable) to the BT Router rather than using a wifi bridge.

Is this possible on the Nighthawk?

TVMIA