Laminate over old quarry tiles?

I want to lay laminate flooring over an old quarry tile floor. The house was built in the 1890s, so I assume there is little in the way of damp-proofing. The floor is pretty cold and un-inviting, but quite level. It has had a cement screed laid in the past but that has been hacked away. IMO it's not level enough to laminate onto directly.

A search of uk.d-i-y has led me to believe that the following is a reasonable course of action: am I right?!

1. detergent clean quarry tiles, abrade and vacuum.
2. Lay a latex screed (I assume this damp-proofs?!)

1. Lay laminate flooring underlay (I like the 10mm thick green slab type)
2. Lay laminate floor

OK??

Si