starting in the large planter from left to right.all these can be sown now,
beetroot (pablo f1 strain) can be harvested as baby beets or left to grow on,fantasticly easy to grow and taste mega.
carrot (parmex strain) small dumpy carrot that taste amazeing, and very easy to grow.
radish (cherry bell strain)super easy to grow and raddishes are mega.
lettuce (little gem strain) small in size takes up very little room very easy to grow.
mizuna (much nicer than rocket)slight mustard/pepper flavour small leaf for salad or let it grow on and use in stirfrys and alike.
All the above can be harvested, from late summer onwards, try planting seed at weekly intervels so there not all ready at once,if you no what i mean.
in the top planter again from left to right,i would go for herbs.all these can be sown now and harvested when ready.
common sage,chives,oregano,rosemary,coriander,and apple mint make sure you put a piece of hard board between the mint and all the other herbs idealy planting at the end of the planter as its quite invasive.
also you may not be aware but you can grow tomatoes upside down in hanging baskets,this eradicates a lot of parasites and infections ,they also look really smart,and seem to grow quicker with less skin split.imho
the reason i say left to right will help to increase yeild whilst protecting some plants from insects.