Aphids

I've not had much trouble with aphids this year, I've spotted them early and squished before they got out of hand.

Fungus gnats have been a nightmare though, they are too fast to be able to squish. I'm thinking of using grit to cover seeds with next year in the hope it will keep the little beggars off, anyone tried anything similar?

Yes, grit - anything to cover the soil really. I had vermiculite out of my aga. I made sure no compost bags were left open. Everything was watered fro
m the bottom. Doors open lots.