Galleywood's flood risk comes almost entirely from rainfall, because the rivers and the sea are nowhere near it. Not a single postcode falls in the river and sea flood zones. Even so, close to a quarter of postcodes rate high on at least one flood measure. Another fifth rate medium. A village on high ground with no river can still have water where it should not.
On the Environment Agency's river and sea flood zones, 0% of Galleywood's postcodes are in zone 3, the highest-probability band, and 0% are in zone 2, the medium-probability fringe outside it. Those zones only model water coming out of rivers or in from the sea. The only water in Galleywood's own history is Vange Creek, at the far end of the old road south, and that is a long way for anything to flood uphill.
The real exposure is surface water, the rain that falls faster than the ground and the drains can take it away. Rivers have nothing to do with this kind of flooding, so a postcode with no river anywhere near it can still be rated at risk. The river zones are empty, so the high ratings here come from the measures that include surface water. Water that pools in a back garden or runs down a road from higher ground behaves differently on every street, and the river maps miss it entirely.
Looking ahead, the Environment Agency's climate-adjusted flood zone also covers 0% of Galleywood. That scenario only asks what wetter weather does to rivers and the sea, so it leaves the rain question exactly where it was.
For insurance, a high surface-water rating can affect the premium, the excess or the terms on offer, even where the river map is clean. The Environment Agency's long-term flood risk service lets you put in the exact address and see the surface-water result, and it is best to get an indicative quote on that address while the sale is still at the offer stage. Being outside the river zones gets you less than it sounds like on the insurance form.
Counting every flood measure together, rivers, sea and surface water, about 23% of Galleywood's postcodes are rated high on at least one, 20% are rated medium and 48% are rated low. A postcode counts in the high group if any one of the measures puts it there, so these shares answer a wider question than the zones above.
On the modelled flood extents, 0% of Galleywood's postcodes sit in a high-risk area with defences and 0% sit in one without. Those extents model river and sea water, so for a surface-water problem the question of defences does not really come up. Nothing in the modelling either protects Galleywood or leaves it exposed. There was simply no river water to model.
About 53% of Galleywood's postcodes fall under a shoreline management plan, and the policy for every horizon, 20, 50 and 100 years, is to hold the line. The nearest coast is about 8.7 kilometres away. Hold the line is a stated intention that depends on funding that has not been committed, and it says nothing about what defences stand there today. A drain blocked in Galleywood will not be fixed by a policy on the Essex coast.
No flooding is on record anywhere in the area, which is reassuring but stops short of proving it has never happened. Surface water floods are the kind that tend to go unrecorded, cleared up with a mop and never reported.
Flood risk is Galleywood's weak spot, entirely because of rain. If the house you want is on one of the high-rated postcodes, the river map will tell you nothing useful about it.