NK53 TKT 26 Apr 2016, 6:30 pm #637 NK53 TKT NK53 TKT NK53 TKT Website Posts: 2441 Threads: 37 Joined: Aug 2015 Reputation: 0 RE: Go North East: Latest News & Discussion - April 2016 (26 Apr 2016, 6:15 pm)Davie wrote Yes. Is there a separate tunnel then just the main tunnel appears to have a 4m height limit and the smallest GNE decker (an olympian) is 4.33m