If you are looking for a discount code for Newcastle onsite long stay, I found this the cheapest code HAYS1, hope it helps.
when parking at newcastle airport using their website use forum16 this gets you the best discount of approx 28% every time. used twice in 2 months instead of £44.99 comes down to £31.99 great saving thats first drink at airport at least?
These codes are still working as of January 2018. I used METRO to get 13 days over Easter down from £59 to £43.
Anybody know one that works for short or medium stay?
Tried all these and they're all coming up with long stay or meet and greet!
Forum16 and NPL10 worked for me in December.