To anyone who wasn't sure about the arrival of Vanguard decks in UK, I contacted Bushiroad and I got a reply about it from Hazuki from Bushiroad. This is what she said:
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Dear Toonbaku,
Thank you very much for your inquiry at Cardfight!! Vanguard support team, this is Hazuki from Bushiroad International Sales team writing on behalf of them.
Currently we have no official shop/distributor in Britain who sells Vanguard packs or trial decks, but would like to find one, as we have just launched English version in Singapore.
We are planning to visit London in February for HYPER JAPAN2012, and sell some of our Vanguard products first time in the UK.
Also planning to hold a teaching session, so hope you and your friends can join us there.
During HYPER JAPAN, our boss is going to visit shops around, so kindly let us know if there’s any card game shop interested in our products.
Thank you and best regards,
Hazuki.
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I hope this answers everybody's inquiry about the UK Products but if you anyone has any further questions, I'll happily contact Bushiroad and give you a reply to your question.