Maybe not but, if you connect a flight in any EU country, you must do the tax refund in that country--before left EU. For example, if you fly from LCY to CDG (Paris) and then China, you should claim your tax refund in CDG.
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半年前 来自穷游
在london city airport退税还蛮方便的,只要将单子都填好,也不用将东西都给海关看,二个月后就可以收到退税金啦。