They are based in Poland so there's no import duty or VAT. In their address form it has a field titled "Company Name" so I've just used that to put "UKARA# SKI00xxx" so that comes up next to my name on the address label. Last time I ordered from them I asked for my UKARA# to be put on the address label and they didn't bother, but my scorpion came through without a hitch either. However gunfire.pl emailed me the other day to ask for my UKARA# (as I'm on their customer database) because they've had a problem recently with UK Customs holding up packages.
BTW, taiwangun.com use UPS couriers, not that it would make any difference in this case. The only time you need to definitely factor in having to pay VAT on an imported package, no matter what it is, is when it's coming from the USA - you may be lucky but don't plan on it. From HK or mainland China, unless it's a gun, my average is about 1:7 gets hit for VAT - I haven't actually been hit for import duty so far, but the most annoying part is the couriers charge a handling fee which so far seems to follow no logic I've spotted => I did ring up UK Customs one time to find out if I could pay the VAT in advance, in order to avoid the handling fee - yes I could, but if i did that the courier would have to surrender the package into the custody of the Customs ppl for them to process, so it would not get back into the courier's hands at all quickly or perhaps not at all (he didn't know but said that it's just not done so if I insisted I'd be best to arrange for my own courier to pick it up from UK Customs :blink: ) so basically it's a fucking racket, just like car insurance [/rant]