It

"Well despite what I’ve been saying in the last few weeks, I’m now going to lead a government which is going to leave the European Union, and I’m going to sit down with you all and find out what it is you want to negotiate that will determine new arrangements for ourselves and our businesses and for our investors that secure a new base for us in the globalised economy." (Kenneth Clarke - British MP.)

What does the pronoun "it" refer to in the above statement?