Plasterboard import request United Kingdom

Good morning,
I am interested in buying plasterboard in large quantities, so I have the following questions;
1. How many sheets of plasterboard are there in a pallet (12.5mm 2.4m X 1.2m)?
2. What is your minimum order quantity?
3. How much would it cost to deliver to Liverpool or Southampton in the UK?
I look forward to hearing from you.