Hi,
We would say that scenario 1 would be the best way to decribe this series of transactions.
The UK company are making a supply of goods to a Dutch company in the UK so this would be a taxable supply.
The Dutch company are then exporting goods from the UK to Columbia and this would be a zero rated supply of exported goods.
Please see the rules for exporting goods below:
Conditions and time limits for zero rating
As the Dutch company are making a zero rated supply of goods in the UK they could therefore register for VAT and treat the VAT charged to them as their input tax to claim on their UK VAT return.
Thank you.