When I ordered my Empeg from CarPlayer, they thoughtfully labelled it as "hard drive - $89", so import duty was (IIRC) only about fifteen quid. If it's being shipped from one private individual to another you might get away with the "gift" defence, but if it's from a company then that might not wash.

Steve.
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Mk2a 10+40Gb Darkstorm Neon Red Nakamichi CD45z, Genesis Five Channel, Genesis A16s, JL 8W6 x3