Shipping direct from China to customers

Question

Hi I have a couple of questions regarding shipping direct from china to my clients

I am a U.K. Based business and I am VAT registered

If I sell to a uk business but the goods are shipped directly from china and the customer is the importer do I have to charge the customer on the invoice plus vat? Which means that when the goods land in the U.K. The customer has to pay vat again? Meaning they pay vat twice?

The same scenario as above but this time the customer is registered in the Channel Islands but goods are being shipped direct from china to a U.K. Warehouse channel island customer as the importer do I invoice plus vat

Same scenario as above channel island customer but goods being shipped direct from china to Switzerland do I invoice plus vat

Same scenario as above but this time client is a European customer with a vat number goods shipped from china to Europe customer as importer