Thanks for the advice though, I think I will look at getting a powered hub. That brand isn't available in the UK (where I am) but there are others that look similar and have good reviews.
have a looks for the dlink dhub7 there about 15-20gbp but by far one of the best hubs you can get in the UK and will happily run your miners all day long
http://www.amazon.co.uk/D-Link-DUB-H7-7-Port-USB-External/dp/B0002AFZVM/ref=sr_1_sc_1?ie=UTF8&qid=1436562643&sr=8-1-spell&keywords=dlink+dhub+7
this is a good hub. it can do 2 of them pretty well.
would run more than that they come with 3amp plugs iv got 3 and a hexfurry running on mine never had any trouble