Garden drainage

Hi there,

We're going to put down artificial grass in our garden but we have a bit of a drainage issue - water gathers just in front of the patio and we've been told we need to dig a "chase" into the concrete (which isn't very deep) and put something like gravel in so that the water will soak through and under the patio to the drain. Hope that makes sense.

Does anyone know someone in the area who could do a job like this?

Many thanks,

Emma