Thanks guys for getting back.
Kevin I can SSH into the Pi using PuTTY without any problem using the NeoRouter address, it's just when I try and connect using Neo Router's VNCViewer that the connection is actively refused. As I stated earlier using the TightVNC (installed program) viewer I have to use the LAN address of the Pi as the VPN address times out.
Shane the Iptables -L output is
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Not sure what that all means though, I suppose I should Google it
Many thanks for your help though.
Regards
Roger