I dug up my old lawn as it has become a lawn of moss. Turned the soil over, raked it, removed any weeds, added a top layer of topsoil and then the seed with the additives and fertiliser. All pre measured so felt confident and optimistic. After watering religiously the first shoots appeared. Kept watering and after probably 6-8 weeks the lawn was full and lush. Have kept the cut height high which has helped during the hot weather, have reseeded a few small areas where the birds nicked the seed and have kept periodic watering. All good now. Photos show before, during and after, hopefully you can see the difference!