[Gene]

Answers:

>> Just wondering, will my Nintendo 12 mnth warrenty be valid because I have imported to UK???

According to the DS manual: "This warranty is only valid in the United States and Canada."

>> ... but would it be better to get [warranty]?

Depends on the coverage you want. Most warranties offered by retailers are longer, typically up to three years, and have better coverage. Also, with the Nintendo warranty you have to pay for the shipping to and from Nintendo to have the device repaired. That can cost more than 15 bucks, which would make the warranty offered by your retailer a better choice as you don't have to pay for shipping and the process is much faster.