Are you sure it’s arable land? The majority of solar farms in the UK are built on low-grade land that aren’t suitable for growing food.

I wonder if that will remain the case. The input costs for farming are increasing (seed, fertiliser, energy), the output is becoming less predictable (flood, drought) and the grants from DEFRA which are meant to smooth things out have dried up somewhat since Brexit. If farmers are offered a guaranteed income for a field, I suspect they'd take it.

Green grass is still good to look at.