[ExOP1tica]

I want to SE a jacket

In my experience clothing will depend on how many items are in the order, and the nature of the delivery. I've mostly had success with PEB and DNA.

I haven't heard of this company, but I just had a quick look at their delivery terms and conditions:

5.3 If the Goods you ordered are not received within three (3) working days of the date on which delivery was estimated to occur then you should contact us, using your order number to identify your Goods. Contact via email is preferable but can be by any means available. We will note that the order has been delivered late and will contact the courier if appropriate. If the Goods were sent by Royal Mail and you have not received them, you may then be required to complete a Royal Mail P91 form as part of the investigation process.

Looks like a DNA would be fairly straight forward, I've had to fill in that Royal Mail form in particular.

The only stipulation is:

5.5 The Goods will be your responsibility from the time you, or a nominated party, take possession of the delivery.

If you're wanting to try and DNA the package, different companies have different definitions of "taking possession of the delivery". So I would exercise some degree of caution.