Thanks duffykins & henkg.
During the week I ordered a Netgear DGN3500 Gigabit wireless modem/router (£42 inc.delivery! Was worth it in the end duffykins) with 4 ports. I only need 2 at the most right now wired. Against some advice, I also ordered some CAT6 (rather than 5) cables.
So, I have the NAS 110J connected to the new modem/router with a CAT6, and the PC also connected with a CAT 6 cable to the same new modem/router. Transfer speeds now within Windows explorer to the NAS reach an average of 40mbps. I get the feeling that is the best I'm going to do?
I tried a laptop also, and the average speed there was 11mbps.
Am I likely to be as far as I can go in terms of transfer speeds? Don't get me wrong, 40 is the difference between night and day compared to 2mbps! However, if there's a way of achieving a faster transfer speed, I would like to reach it.
Thanks for your advice and help both of you