IOR business type for Amazon Global Logistics

Hi all, I'm shipping with Amazon global logistics (I have done many times previous). I've just had an email asking me to setup a new IOR as AGL has enrolled a new UK customs broker and the previous GB IOR I signed is overdue.

I'm trying to setup the new IOR but I'm being asked what my IOR business type is, I have a LTD company, but it doesn't give that option.

My options are :

Corporation, LLC, LP, LLP, Partnership or Soletrader.

I'm thinking LLC is most similar to LTD company (can't remember if that is what I selected last time I did this). Anyone just been through this and can advise?