We aren't self sufficient, though whether this is by accident or design is up for debate. Last year we imported 1.3mt of milling wheat as there was a shortfall towards the end of the season. There is an argument that says 100% self sufficiency is a bad move, as if there is no risk mitigation in case of a harvest failure in the UK.Just spent a week in Suffolk where Maize was being harvested for Biofuel, is that an effective use of land if we are importing wheat etc, or are we self sufficient in what we can grow in the soil and this is a bonus?
Personally, I have a big issue with farmland being used for energy crops and solar pv when it could be used for food production, either arable or animal. Unfortunately the narrative is Net Zero, Rewilding and the offshoring of agriculture, and the NFU have massively drunk the KoolAid, so pushback from farming is limited to a few voices shouting in (at ?) the darkness.