mole08 wrote:This may not help at all but have you tried enabling the 'multi Channel concurrent' setting in the adapter config and seeing what happens?
Turning on multi-channel-concurrent in the adapter config should let you receive twice the width of signal BUT you also need to log into the Virgin Superhub 2 so that you can turn on the appropriate settings inside the Wireless-Radio menu which is under the advanced-settings, otherwise there will be no improvement. The Superhub 2 is not set up to broadcast more than one channel to a single receiver by default in part because the range of a good signal is effectively a shorter distance and partly to reduce signal congestion.
I did it for a while on my main computer when I needed a much higher speed but was forced to use a 2.4GHz stick until a new 5Ghz arrived. I felt bad about it though because there are effectively only three 2.4Ghz channels to share for neighbours nearby 1, 6 and 11 and twice the speed means connecting to two of them. You can see the strength of each person's WiFi and which channels are used with software such as InSSIDer.
An alternative is a USB2 (or possibly usb3) to Ethernet adapter to connect to the hub physically which avoids problems of wireless totally, giving a good consistant speed with much less latency than WiFi if you don't mind being tethered to it.
The most obvious alternative for the tablet would be a 5ghz wireless stick where those bands are much less if at all used.