At the moment I have PC connected to Broadband with ethernet cable and laptop connected wirelessly. Going to do away with PC and get another laptop. Does one of them have to be connected with ethernet cable, or can they both be used wirelessly. Probably a silly question, but I'm not too savvy with networking yet.
You only need to use a "wired" ethernet connection for either the initial configuration of a *ROUTER* or any subsequent changes to its "wireless" settings.
As your router is already set up, you should be able to connect a new Laptop to it wirelessly straight away. Using an ethernet cable wouldn't achieve anything, other than proving that a "wired" connection works.
When you get your new laptop it will search for wireless connections automatically. ( Make sure the wireless switch is on). Select your router and type in the security key etc. as with the other laptop. No need to connect it initially with an ethernet cable.