See Comment #1 for 2019 updates. See Comment #2 for 2021 updates.
2018 I tend not to track vegetable growing, but take exception here as this is a first and seems a delicate operation. They're delivered in a cardboard box 33×24×2(㎜), surrounded by damp newspaper in a biodegradable plastic bag.

It seems to hot to put them out now at 12 Noon BST so will wait till the evening. The plant spacing is recommended as 4 to 6 inches.
Some 120 planted out as the sun was setting in 4 rows of approx 25 plants with 6" spacing and 9" between rows.

See Comment #1 for 2019 updates