Laying turf up to and over concrete edge

as long as it has a little sharp sand on top and I wouldn't recommend turfing in current weather wait till we have a bit of rain

Good quality turf..as long as the concerete haunching is weathered and old not recently cemented....plenty of good soil and a depth of 1-2 inches are necessary...water well and turf should establish..if we move to lack of rainfall the ensure these areas are well watered as they will be the first to dry out in particular if the soil depth is very shallow

Aslong as you have nice soil running up to your edges the turf will grow fine i wouldnt advise blinding with sand as after time the sand will wash away and if there isnt enough nice top soil there the grass wont grow to its best potential.

As long as there is still a reasonable depth of good soil under the turf it should be fine. As others have said, where there is less depth of soil it will dry out quickly in hotter weather so will require more watering before it goes very brown.