What cables can I run in concrete
I have not seen cable of any sort in direct contact with concrete. It has always been placed in conduit, in the gravel bed. At the least it has been UF in the gravel bed, but never low voltage in direct bury. 

In my opinion, you would be wise to place 2 conduits under the level of the concrete. This with keep the concrete from cracking over the pipe, it acts as a control joint, but on the underside if into the concrete. The 2 conduit need to be separated at least by 6" more if possible. This will keep the low voltage from picking up on the interference created by the line voltage.

Your length of run, should be good, in the States there is a maximum run of 200 ft between pull boxes (Maybe it is 100'), one of the electrical guys can firm this I hope. Never the less, you are ok on this.

If you are using direct bury cable, after you get out from the edge of the concrete, I would get it down 18" if possible, or keep it in the conduit to protect it from casual digging.