I write that Title with confidence - but actually I'm not sure what the title should be. In the interests of simplicity I'm gonna just put what situation I have and what I'd like to change it to and just hope that someone can guide me ! HOUSE Broadband coming into the house via telephone line Thomson Speedtouch 510 which dishes out IP addresses starting 192. Airport Extreme dishing out IP addresses starting 10. and delivering home wifi network (A) - I believe this currently has double NAT errors which I am ignoring Powerline Adaptor (Devolo) Long Garden GARDEN OFFICE Powerline Adaptor (Billion which delivers home wifi (B) WISH LIST Thomson just acting as a modem Airport Extreme doing all the routing and dhcp etc with the 192. IP range ONE SSID in the house and the garden office so that devices seamlessly move from one to the other and we can print to the garden office printer from the house computer. HOW I THINK IT COULD WORK but am afraid so haven't tried it yet Connect to Speedtouch and change setting so it's BRIDGE or MODEM ONLY Change the Airport Extreme to use the IP range 192. etc Change the billion WIFI style Powerline Adaptor for another DEVOLO (ethernet only) Connect another modem/router (I own a belkin & a netgear) to th DEVOLO via ethernet (not sure which port to connect it into) Change the settings on the BELKIN or NETGEAR router so that it doesn't try and be a modem but just extends the network with the same SSID as the Airport Extreme. Other points worth mentioning:- The devolo and the billion were tricky to get to work together and more by luck than judgement I got it working and my other half can have WIFI in the garden office (albeit on a separate SSID). I am very anxious that in trying to get the network setup as per my wish list that I will break the existing setup and end up without it working at all. Some of my difficulties are because my Macbook air doesn't have ethernet on board so I need to get a USB adaptor to connect to the modem directly to enter the settings for it. I plan on buying one of these later today. Desperately hope I've made this as clear as possible. Any help / guidance very much appreciated.