This site helps with serial numbers: https://www.kurtkaminer.com/TH_raleigh_serials.html and here - https://dentoncycles.co.uk/2018/08/...t-sbdu-and-raleigh-special-products-division/ - which is useful for SBDU bikes from Raleigh.
The 'W' means it was built in the Nottingham Lightweight Unit
'N' - October
'3' - 1983
So it's a 1983 made Raleigh Panasonic Team replica and should have Campagnolo Nuovo Record components. I'm guessing the wheels are Mavic Sup? Some came with Shimano 600 instead of Campagnolo.
This page has some interesting stuff about SBDU bikes: https://dentoncycles.co.uk/category/production-facilities/raleigh-special-products-division/