Your house is star wired like mine was. One of the sockets you have will (should) be a master socket, it just does not have a detachable faceplate, like the more modern ones.
The challenge is to get Openreach to provide a new socket without parting with money.
If you want to have a new type master socket, I suggest you decide where you want the socket located and how the wiring should run, bearing in mind that the correct way to connect slave sockets is to use 3 wires, though many modern phones only need two.
For best results you should keep the incoming wire as short as possible and use a filtered faceplate with the router directly connected to it. This is more important if you have a long incoming telephone line and the inevitable weak ADSL signal.
Installing a new type mastersocket is not essentail but may give better results.