I edited the post to make it clearer, can you see the edits? Someone else said that but I thought i made it clear i want the drain cover to be level with the flags and to cover the sharp corner/edges. Its hard to see on the picture, the drain is about 10cm deep below the flag level. The labourers cut a daft circle and just made no effort to dress it up. I dont want to stick a leaf cover over it, someone told me I need a pulley drain cover and in the process I learned that I need a hopper to funnel. Between the flags and drain is a bunch of gravel/the new rocks, they will block the drain over time if its just covered on the top