Thanks, by the time I had posted I had tried various things and just stopped digging further, but
I have disabled dhcp on eth0 and it has a static address on the same segment as the router, but outside its dhcp range. I also made the changes to eth1.
I now can ping any internal or external ip addresses and hostnames ...There is browsing on the server but none on the clients.
On eth1 is a router which I have in AP mode, with all NAT/firewall and DHCP turned off and the clients can get on the network, but cant access internet.
Maybe it's that the the solution looks different to what Im currently trying.. I initially had a wireless router AP and clients, to this I wanted a zentyal as gateway and added an external wired router and made the wireless one an AP. Seprate elements seem to work, but I never seem to get the whole thing working
Thanks for your help