Repairing exterior tiled path.
I have and Edwardian house and the front path has the original tiled floor. Recently the Water board came and removed an exterior pipe. In doing so they had to dig into the path. I managed to take up some of the tiles to refit later but currently there is a hole around six inches deep which needs to be filled before it is retiled. My question is what exactly should I use to fill the hole? The hole is only about a metre square and I need a flat base to retile? Any advice would be appreciated.
Many thanks
Rob