Thanks BG, I thought it might have been a bit of a shock for them going from a semi shaded spot to full sun? Hopefully they'll pick up in the next few days.
When our little worm army gives us some more worm juice, I'll water it down a little and give the tomatoes a drink. We've got 4 plants in the bed, and another 2 in a tomato tower, so we should get something lol!