EU referendum, brexit and the aftermath

Is Brexit purely to blame or an over reliance on JIT across the board?

Depends on what your angle is, really. JIT has broken down, so we have the escalating issues with stock delivery. Why has JIT broken down? Brexit.

Therefore if we didn't have a huge reliance on modern (JIT) supply chains then the issues we are now facing (removing cabotage, customs border troubles, foreign born workers going home) wouldn't have done the damage that they have.

But, we did/do have JIT - no modern supermarket (local or standard) has storage, it's all designed to be delivered and run out onto the shelves, sold through and re-ordered from suppliers etc etc.