Wasn't there a requirement to have a blood test and then wait 6 months?
If I find it I will publish the link here.
http://www.defra.gov.uk/wildlife-pet...ts/pet-owners/
The six month rule for entry or re-entry to the UK
Your dog or cat may not enter the UK under PETS
until six calendar months have passed from the date that your vet took the blood sample which led to a satisfactory test result. Once the vet has issued the PETS documentation and that six month period has passed, the PETS documentation is valid for your pet to enter the UK. For ferrets, the waiting period is 21 days from the date it was vaccinated (because they don’t need to be blood tested)
You need to read the whole document as their are anti worming and tick treatments necessary as well.
Note the rules are changing on 1. January 2012