If you have a look at the TP-Link TL-WR702N Wireless N Nano Router/Range Extender. You can connect it to an Ethernet cable that is connected to your hub and it can be set to either act as a wifi extender or a router etc.
If you do a search on the well known Internet shopping site you can get one for about £15.
Can I Get a WI-if extender that uses CAT 5 or 6 instated of my houses 230v wiring?
There are some BT options here
Have you ever used one set up looks essay. Will it slow down loading down a lot?
Yes I have set one up in my son's house and it works without problem and was easy to set up. I have not done a lot of downloading on it but as far as I am aware it is no worse than any wireless router.