If you have prime/free delivery it appears that a lot of items under €22 will come without any VAT/import charges applied. An EU rule allows the import of items under €22 without being subject to any VAT but this will be closed in July it appears.
I'll get us going:
I got this nifty utility knife before christmas and thought I'd get a second:
https://www.amazon.co.uk/gp/product/B07SJY8KK6/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Costs: 12.99
Apply Utility Knife voucher -10%
No VAT obligation -20%
Final price: £9.74
Note: Does not apply to all types of item. Also, discount only visible at checkout!