Thanks All for your replies..so have managed to cut the channel.. now a question about the trunking please ..can I just use plastic trunking to house the sky coaxial cable under the floor like this one which is I have used to get it till the doorway by running it above the skirting.
http://www.screwfix.com/p/tower-self-adhesive-mini-trunking-16mm-x-16mm-x-2m/60548
Also would appreciate your help on how to cover the channel.. can I use a concrete filler on top of the plastic trunking in the channel ?
http://www.screwfix.com/p/tower-self-adhesive-mini-trunking-16mm-x-16mm-x-2m/60548
Also would appreciate your help on how to cover the channel.. can I use a concrete filler on top of the plastic trunking in the channel ?