Thanks.
BTW I'm in the UK not Argentina and it's a TL-WA830RE not a TL-WA901ND, not sure where that came from.

Think I'm almost there, done as you suggested and there is internet access now but only if I have the Wireless Network Name: of the TL-WA830RE different to the router and connect directly to it. I was hoping to seamlessly have internet access to the same network name whichever room I'm in.
If I have the TL-WA830RE Network Name is the same as my router it stays connected to the router if I'm in the room where the TL-WA830RE is situated with a very weak signal.

Router IP Address : 192.168.1.1
Router DHCP IP Address Range : 192.168.1.50 - 192.168.1.254

830 IP Address: 192.168.1.10
830 network Gateway: 192.168.1.1
830 DHCP Default Gateway: 192.168.1.10

And whats with the random question not working 9 times out of 10????