Observation

the warmer bed where I grow courgettes and beans will grow these again

Micro-climate definitely puts a damper on my crop rotation too - thankfully it's not really necessary in no-dig gardening, unless you encounter a persistent soil-based disease.

I do know from observing last year that the two beds nearest the fence get partially shaded in the afternoons (surprise, surprise!), so I'm now wondering if I should change my planting plan and put the outdoor tomatoes in a less shady spot. Hmm...