Lower Marsham · part 1 of 7
The Vanishing Discount
Lower Marsham, Episode One. On the Hendersons, the Bank of England, and the £4,083 that nobody stole
In the summer of 2019 the Hendersons bought Millstream Cottage, Lower Marsham, for the full asking price of £312,000. The survey noted, in the mild dialect of surveys, “historic flood events affecting the lower ground floor.” Their solicitor raised it. The agent had the answer ready, and the answer was true: insurance was no longer a problem for houses like this. A quote came back within the hour at a few hundred pounds. The Hendersons exchanged, completed, and moved a piano into a room that has been underwater twice since the war.
Nobody in that chain lied to them. Hold on to that fact, because it is the whole story. The agent told the truth, the insurer told the truth, the lender’s valuation came in at the agreed price, which was also, in its way, the truth. The Hendersons were fleeced by a market in which every individual participant was behaving honestly. It takes a government scheme to arrange that.
Here is what the old world looked like. Before April 2016, a house that had flooded carried its history around like a limp. The average insurance quote for a property with a flood claim stood near £4,400, where a quote could be had at all, and the housing market priced the limp accordingly. The Bank of England later measured the effect with some care: flooded properties traded at a discount of 1.6 per cent against dry neighbours on the same street. That discount was not a cruelty. It was information, compressed and delivered to the one person who could act on it, namely the next buyer. It said: water has been here, water knows the way back, and the price you are about to pay should reflect the acquaintance.
Then Flood Re switched on, quotes for flood-hit homes fell by 70 per cent, and the Bank of England sat down with 1.75 million English property transactions matched against Environment Agency flood maps to see what the housing market had done with the news. The finding deserves to be read slowly. The discount did not shrink. It vanished. The scheme’s estimated effect on flooded-property prices was an uplift of 1.8 per cent, sufficient to erase the old discount entirely; at the sample’s average price that uplift comes to £4,083 per flooded property. Transactions in previously flooded homes rose as buyers stopped asking the question the discount used to answer. The paper’s own summary, in the restrained house style of central banking, records that the scheme “completely offsets the negative pricing effect of flood risk, irrespective of the risk measure we employ.”
A market that prices flood history at zero is not a market with a modest opinion about water. It is a market with no opinion about water at all. And the discount, that had been doing this work since before anyone thought to measure it, was gone within a couple of renewal cycles.
Where the money went
Follow the £4,083, because it did not evaporate; money never does. When the scheme launched in 2016, the value of every flood-prone house in England was quietly... no. Let me say it properly, since the whole subject is the suppression of plain speech. When the scheme launched, the capitalised value of the subsidy was handed, in a lump, to whoever happened to own flood-zone property on the day. A one-off windfall, unearned and untaxed, delivered by administrative fiat to the sellers of wet houses. The Hendersons, arriving three years later, paid that windfall to their vendor in cash at completion. Over the scheme’s lifetime the cumulative transfer into flood-zone property values is estimated at £4.4 billion, which is not the cost of Flood Re. The levy is the cost of Flood Re. The £4.4 billion is the size of the falsehood: the gap between what these houses fetch with the truth suppressed and what they would fetch with it spoken.
The chain of professionals standing between the Hendersons and that number were long, and every link in it was innocent. The agent priced against comparables, and the comparables had absorbed the subsidy. The lender’s surveyor did the same. The insurer offered the tariff the scheme prescribes. Ask any one of them where the risk went and they will refer you, correctly, to the next desk. The genius of an administered price is that it deputises honest people to distribute a falsehood, which is a great labour-saving over the old method of employing liars.
What did the Hendersons actually buy for their £4,083? Not protection; the water is unmoved by the Land Registry. Not even insurance, exactly, since the premium they pay is real and recurring and separate. They bought an absence. They paid a four-figure sum for the removal of a piece of information that was, until 2016, delivered free with every set of particulars — and they will only discover the purchase when the scheme that maintains it expires, or when the water calls first, whichever falls due earlier.
There is a defence of all this, and it is not stupid, and this series will give it a full hearing in time: before the scheme, real families in real houses could not buy cover at any price, could not remortgage, could not leave. The question this series asks is never whether those families deserved help. It is whether a country that wished to help them was obliged to do it by falsifying the price of their houses, so that the help arrived invisibly, regressively, and attached to the deeds, where it now compounds ahead of a statutory deadline. Buyers who paid the new price, lenders who advanced against it, and owners skipping the improvements the old premium used to demand: the falsehood has been recruiting since 2016, and its recruits are all, like the Hendersons, innocent.
A postscript, dated this July. On the scheme’s tenth birthday, Flood Re and Defra announced a package of reforms: cheaper tariffs for the cheapest bands, dearer for the dearest, discounts for flood doors, a cap on the largest claims. The series will judge each in its proper place, and some deserve the judging. Note here only what the package does not contain, which is any provision for the £4,083. The reforms rearrange who pays for the falsehood. Not one of them proposes to stop telling it, and the Hendersons’ deeds are exactly as adjusted this morning as they were in June.
The Hendersons are fictional. Their village is fictional. The name of the village is the oldest joke in this story, because English place names are a flood map with a thousand years of data behind them, and Lower Marsham has been disclosing its own risk, in its own name, since the Domesday clerks wrote it down. Every institution in this essay has spent a decade arranging not to hear it.
The river below Millstream Cottage rose in 1947, in 1968, and twice since the Hendersons’ piano arrived, though on those last occasions she stopped short of the airbricks. She holds the only ledger in this story that was never adjusted. The river has not read the Bank of England’s working paper. She was, however, its primary source.
Principal sources: Garbarino, Guin and Lee, “The effects of subsidised flood insurance on real estate markets,” Bank of England Staff Working Paper No. 995 (Journal of Risk and Insurance, 2024); Flood Re Annual Report 2025/26; Flood Re/Defra reform announcement (1 July 2026). Next in the series: The Tariff of 1991, on what a council tax band knows about water.