OK plugging straight in didn't help so I started over again, with a hard reset to reload the default settings, and discovered a setting which enables remove web based GUI management so I enabled it at now I can access both of the routers on my network. I also changed the channels on the routers so that they don't overlap which should give better performance.
Incidentally I also changed the software on the router from the factory supplied software to DD-WRT which is one of the alternative source software packages for wireless routers, looks decent and seems to add a bunch of options.