There's new legislation coming into effect 1st May which affects anyone using any sort of procedure that postpones the payment of duty and VAT on import, which a bonded warehouse does.
Here's some light reading for you.
Authorised Economic Operator - Detailed guidance - GOV.UK
The Union Customs Code - Detailed guidance - GOV.UK
Whether you want the burden of applying for and administrating a bonded warehouse entirely depends on how much saving you plan to make.
A growing number of tariff codes are duty free, these days, which only means VAT comes into play on import.
VAT which can be reclaimed.
My AEO application has been accepted, but it took a few attempts.
HMRC have a terrible habit of only looking at wrong answers on a step-by-step basis.
For example, if you get question 10 wrong they won't go any further and will just throw it back at you.
You correct that, then they reject it at question 15....repeat until finally accepted.