I'd add it all in together Andy. Why over complicate a job by having to spread it three times? I don't think it would do any good to add the sand first to help with drainage and then have to walk all over it squashing it down to lay the grass seeds.
Grass grows very well so you wont have to be as delicate as you think - I'm not sure what the weather is like with you but remember to water it if the rain isn't around to give it a good start
Very good but basic, and most relevant to small patches of lawn. How about advice on handling larger lawns? Comparison of the wide variety of Powered Lawn Aerators, Scarifiers and Lawn Rakes would be most welcome, since there is much confusion over aeration/scarifying and advice on aerators in particular would be very helpful.
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Grass grows very well so you wont have to be as delicate as you think - I'm not sure what the weather is like with you but remember to water it if the rain isn't around to give it a good start
Thanks Clarington - my kind of answer.
Point noted re. watering. Many thanks once again.