filling in broken tiles to make floor level again

[surfingmace]

Hi I lifted the carpet and underlay to lay a laminate floor and when taking the carpet grippers off the tiles they were nailed to obviously cracked. This is about a third of a tile all the way around the room and there were a couple that all broke. The tiles are about 3mm thick and they have been laid on a concrete floor with some sort of black paint on top of the concrete. The room size is about 8mx6.
What product should I use and can this be bought at a focus/b&q type store.
Thanks
Stuart