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Yeah that would be the best thing to do just to know for sure what's going on with it, this is what royal mail say on there site - Royal Mail works with trusted delivery partners to deliver your international mail. After your item has left the UK, you may find more detailed tracking information on our delivery partner’s website.
Choose a delivery partner below and enter your reference number on its website to find out more. seems like it might be worth a shot at least.
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