Mostly no, with a few streets where the answer flips completely. Only a small slice of the area sits in the mapped river-and-sea flood zones. Nothing here has a recorded flood history on file. A pocket of properties does carry high risk, and they sit in identifiable postcodes rather than scattered about at random. Flooding in this town is an address question, not a town question, and anyone answering it at town level is answering the wrong one.
Taking rivers and the sea first, the Environment Agency's flood zones cover about 3% of the area's postcodes in zone three, the higher-probability band, and under 1% in zone two. Zone two is the additional medium-probability fringe sitting outside zone three rather than a larger area containing it, which is why it reads as the smaller number. Both are shares of postcodes in the zones, and they describe water arriving from a river or the sea, nothing else.
Surface water is the mechanism this brief does not measure separately, which matters in a valley town built where several streams once carried mining spoil. The combined postcode indicator further down folds surface water in alongside rivers and sea, so it picks up drainage risk that the flood zones miss entirely. Where a specific property is concerned, the surface-water map is the one worth pulling up, because it routinely flags streets nowhere near a watercourse.
Looking forward, the zone share with a climate allowance applied rises to about 4% of postcodes. That is a modelled allowance for how the extent changes as rainfall and sea levels shift, not a forecast of a particular flood in a particular decade.
For insurance, a property outside the zones should attract ordinary cover on ordinary terms. Inside them, expect the quote to reflect it, expect questions about previous claims, and expect the difference to show up as an excess rather than a polite footnote. Get an indicative quote before you instruct a solicitor rather than after, because the premium is part of the running cost of the house and the mortgage offer will not wait while you find that out.
On the broader postcode indicators, which rate each postcode on at least one flood measure including surface water, about 11% come out high, about 10% medium and about 30% low. Those bands overlap with the flood zones above and measure a different thing, so they cannot be added together or read as the same picture. One is an Environment Agency zone boundary. The other is a postcode-level risk flag drawing on more than one source.
Counting homes rather than postcodes sharpens it considerably. Across the 28 postcodes that carry any recorded risk at all from the rivers-and-sea mapping, 547 properties appear, of which 167 are rated high risk, 16 medium and 33 low. Of the high-risk properties, 120 are residential. Postcodes with no risk do not appear in that mapping, so this is a list of the exposed rather than a census of the town.
On defences, the share of postcodes inside the modelled high-risk extent is about 3% whether the model counts defences or not. Identical either way. A defence being present in the model is not a statement that a house is protected, and where the extent does not shrink once defences are included, treating them as reassurance would be a mistake.
The shoreline management policy covering every postcode here is no active intervention, across the twenty, fifty and hundred year horizons. That is a stated intention not to maintain or build coastal defences, which reads more alarmingly than it lands in practice, because the nearest coast is about 4 kilometres away at the closest point. The nearest tide gauge, at Devonport, recorded sea level rising by about 2.35 millimetres a year across its 1962 to 2015 record. That is a measured historic rate, not a projection.
No recorded historic flooding appears for this area at all. That is genuine reassurance rather than a technicality, though an absence of records is not the same as proof that nothing has ever happened, particularly in a town whose drainage was designed around mining rather than housing.
Flood risk here lands in the middle: fine for most of the town, materially bad for a small and identifiable minority, and entirely answerable by putting one address into the Environment Agency's long-term flood risk tool before you fall in love with the kitchen.