Been busy this weekend, need soil help :)

Hi everyone, I have been a busy bee this bank holiday weekend and dug up my entire garden
It's only small and I had a few helpers so maybe not been that busy

As some of you know, all my grass died overwinter and I wasn't sure if it was because of the conifers casting shade and sucking up all the goodness or if it was just bad soil and the harshness of winter to a new lawn

So i've been digging and it looks like the builders just chucked a very thin layer of ash or top soil over compacted clay soil. We've dug it all over (and moved the shed back at the same time) and now im wondering what i should work into the soil to improve its quality.

Well rotted horse manure seems the best bet but we cant seem to find any locally, also the issues of transporting it since im guessing we will need a lot to do the whole garden even though its only small. Im also looking at composted bark, but again, where and how much?

I was going to buy some council compost from the local school, would that work?

Here's what ive been up to

 

Thank you JWK I will lay another lawn but not as big this time because i want some borders along the sunny side and a woodland planting scheme along the shed and near the compost bin in the shade, just a small patch of lawn to keep the guinea pigs and the child happy

Would you say dig organic matter into the whole area but pay more attention to the borders? It looks like we may have a free supply of well rotted manure but ill keep my fingers crossed :D