They have mysteriously found my goods. (In their last letter they said that they had been destroyed). The tone of the new letter is just as dismissive and just as threatening. They asked that I decide whether I wish to continue to challenge the legality of the seizure (I don't) or if I wish to withdraw my claim (I don't). They also bang on about "their" costs, so I thought it fair to mention mine.
Here is my reply: