Jonathan Lloyd explores why planning should start with outcomes, not data, and how too much prescription can stifle ambition before it starts.
Starting with the answer
There is a growing emphasis on vision-led planning. On the face of it, this is a positive shift. But it raises an important question: what does it actually mean in practice?
The risk of defaulting to data
Planning has traditionally been driven by evidence. Baseline conditions, modelling outputs and technical assessments shape how proposals evolve. These are important tools, but they are not the starting point.
When data becomes the starting point, it can define the limits of what is considered possible. Ambition is shaped by existing conditions, rather than future outcomes.
A different starting point
Vision-led planning turns this on its head. It begins with a clear understanding of what a place is trying to achieve, how it should function, how it should feel, and what kind of outcomes it should deliver.
Only then does the evidence follow, testing how that vision can be realised in practice.
From validation to enablement
This requires a shift in mindset, from using data to validate proposals, to using it to enable them. Technical work should not constrain ambition at the outset. It should support it, refine it, and help deliver it.
The role of prescription
There is, however, a tension. Planning frameworks, guidance and standards are often highly prescriptive. They provide consistency and clarity, but they can also narrow the space for innovation.
Too much prescription, applied too early, risks closing down options before a vision has been fully explored.
Keeping ambition alive
The challenge is not to remove standards or evidence, but to apply them at the right point in the process. Vision first, testing second, refinement third.
This allows ambition to be set at the right level before it is shaped by constraints.
Where next?
Vision-led planning is not about ignoring evidence. It is about using it differently, starting with outcomes, and then working back to understand how they can be delivered.
Because ultimately, good planning is not just about responding to what exists. It is about shaping what comes next.
