@jemimafuddleduck
Good luck with the process.
"What sort of things are they looking for?" Ours wanted to know about our fertility issues, which had been over a number of years (6.5) trying to have baby number 2.
A bit of general stuff, which I have forgotten (it was almost 8 years ago now, our son has been with us almost 6 years).
I did clean up a lot, and the social worker did look around the house. Just really looking to see we had room for another child, I think. But I needed to feel confident the house was OK!
"Obviously we will make sure the house is clean and tidy but our garden is a bit of a mess at the moment as we've had some work done and need to get a skip to get rid of some waste - will that go against us?"
I don't think it will go against you if you have plans to sort it out, IMHO. I agree with Jannt86 " Just take it on board, don't take it personally and ensure them that it'll be sorted prior to approval and it shouldn't cause an issue."
we had our daughter for 9 years and they still found things about our house that we needed to change for adoption!
Of course at the moment lockdown means you cannot do much, other than plan how it will be. You can do some planning re safe plants (we were asked about the plants in our garden and if any were poisonous) and also just security etc, if the garden safely fenced in etc.