Amazon, same item cheaper ordered from .de

Sooler

Why's this? same item cheaper if ordered on Amazon  .de rather than .co.uk,  shipped from EU in both cases.

Test item: £8 cheaper

UK
https://www.amazon.co.uk/gp/product/B07V4FQKKC
Amazon Global Store Order Summary
Items:     £14.19
Postage & Packing:     £3.74
    
Total before VAT:     £17.93
Estimated VAT:     £3.59
Order Total:     £21.52

DE

https://www.amazon.de/gp/product/B07V4FQKKC

Has a 5% voucher applied


Amazon.de Order Summary
Items:     EUR 9,24
Postage & Packing:     EUR 3,49
    
Total before VAT:     EUR 12,73
Estimated VAT:     EUR 2,55
Total:     EUR 15,28
Promotion Applied:     -EUR 0,55
Order Total:     EUR 14,73
Order Total:     GBP 13.07

Clowance

UK not part of EU, so likely to be customs and admin charges on top of any purchases? Not sure about tax. There have been a number of posts about people being stung by extra charges whether legal or not by eu suppliers since 1st jan 2021.