Buying 100 IPhone cases from China to the UK. Any tax costs?

I'm going to buy 100 cases made to fit the iPhone 5 from china. They are posting it to the UK. But before i buy anything i was just wandering what tax costs (if any) are there going to be for these cases. ***Note the iPhone cases do not have any logos on it so there's no copyright infringement.***

See UK Government guidance below.

Http://www.dutycalculator.com/help_center/Import-duty-taxes-when-importing-into-the-United-Kingdom/

20% import VAT + £8 or so VAT collection fee, + possible duty depending on total value.