Yeah £6 is more than enough but I recommend buying Litecoin or Bitcoincash as the fees are lower and 2 or 3 quid is more than enough and g0d has promos on them too.
Just checked the original link and I'm not sure if its changed, it says Tracking number: shipped1-31shipped3-1. It was originally shipped on the 31st but I'm not sure if the shipped bit is new or what date it would refer to.