Hmm odd... This site mentions it was an NF.II even, plus has a different date (slow administration?) and different squadron number:
http://www.dehavilland.ukf.net/_DH98%20prodn%20list.txt
This site also suggests it could have been an NF.II:
http://www.mossie.org/squadrons/27_squadron.htm
If you ever happen to find a picture of this machine, please let me know.