Episode Summary
Executive Summary: The episode debunks misleading headlines about migrants supposedly getting half of new homes, showing the claim is based on a flawed comparison of existing housing supply and past migration, not reserved housing. It then examines Welsh reading standards using older weak evidence versus stronger PISA data, which shows serious literacy problems. Finally, it explains why UK borrowing costs are high: Liz Truss’s mini-budget mattered, but global rates, oil prices, and political uncertainty now play bigger roles.
Main Topics: Misleading claim: migrants and half of new homes (Priority: 5/5): Nathan Gower investigates a Daily Express headline and shows the Conservative Party’s analysis compares homes built since Labour took office with net migration, then assumes average household size. The story does not show homes being assigned to migrants or reserved for them. How housing and migration interact (Priority: 5/5): Experts explain that migration increases housing demand, but the effect depends on supply. The same Conservative-style calculation would have looked worse under the previous Conservative government because migration was much higher then. Welsh literacy claims and what counts as functional illiteracy (Priority: 5/5): A claim that one in five Welsh children leave school functionally illiterate is traced to old, poorly specified reports. Cathy Rastel clarifies the concept and argues that better evidence comes from PISA, which shows serious reading problems in Wales. Evidence on reading standards in Wales (Priority: 4/5): PISA 2022 results show Welsh 15-year-olds performing below the OECD average and below England. A concerning share fell below the baseline level needed for functional literacy, suggesting substantial reading deficits. Bond yields, Liz Truss, and the ‘moron premium’ (Priority: 5/5): The programme explores whether current UK borrowing costs are still driven by the 2022 mini-budget. Duncan Weldon argues that Truss was an important catalyst, but today’s high rates are mainly due to global interest rates, oil prices, and some political uncertainty. Football pitches and the size of Wales (Priority: 2/5): Rob Eastaway explains that football pitches vary widely in size, so estimates of how many would cover Wales depend on assumptions. A reasonable rounded answer is around three million pitches.
Key Arguments: The headline 'Migrants will get half of all new homes' is misleading because it conflates homes built since Labour took office with migrants already in the population, without any evidence that homes are reserved for migrants. The Conservative calculation uses 275,000 homes built and about 310,000 net migrants, then divides by an assumed 2.36 people per household to arrive at roughly 130,000 homes, or just under half. Even under that arithmetic, migrants would still be competing in the open market for most housing, since only a small fraction of homes are social housing. Migration does increase competition for housing, but its impact depends on how much housing is being built; more supply reduces pressure, less supply increases it. The same logic would have produced a worse result under Conservative governments because migration was much higher then, including a peak net migration figure of 944,000 in 2022-23. The older claim that one in five Welsh children leave school functionally illiterate is weak because it comes from outdated reports with unclear methods and missing data. PISA is a far more reliable source: Wales’s 2022 reading performance was poor, and 29% of Welsh 15-year-olds were below level 2, the baseline for functional literacy. The causes of Wales’s reading problems are likely policy-related rather than simply poverty or education spending, and Wales has not yet fully adopted evidence-based reading instruction such as systematic phonics. Liz Truss’s mini-budget caused a sharp, short-lived bond market shock, but it did not by itself explain borrowing costs nearly four years later. Current high UK borrowing costs are driven more by global interest rates, inflation pressures from energy/oil prices, and political uncertainty than by a lingering direct 'moron premium' alone.
Data Points: Homes built in England since Labour took power: about 275,000 - Used by the Conservatives in their housing calculation Net migration since Labour took power: about 310,000 - Conservative estimate, not officially published Average household size used in calculation: 2.36 people per home - Assumed by Conservatives to estimate housing occupied by migrants Homes implied by migration calculation: about 130,000 - Results from 310,000 migrants divided by 2.36 Share of homes claim: just under half - 130,000 out of 275,000 homes Migration’s share of UK population growth: 99% - Between June 2020 and 2024, cited by Ben Brindle Conservative-era new homes added per year: roughly 220,000 to 235,000 - Last Parliament under Conservative government Conservative-era peak net migration: 944,000 in 2022-23 - Illustrates much higher migration under Conservatives Labour-era most recent annual net migration figure: 171,000 - Compared with Conservative years Wales PISA reading performance: significantly below OECD average - PISA 2022 results for Welsh 15-year-olds Wales vs England reading performance: well below England average - PISA 2022 comparison Wales below functional literacy baseline: 29% - PISA level 2 threshold in 2022 OECD average below level 2: 26% - For comparison with Wales England below level 2: 20% - For comparison with Wales UK 10-year bond yield after mini-budget: rose from about 3.7% to 4.7% - Immediate market reaction in 2022 Current UK 10-year government bond rate: about 4.8% - Described as the current level Long-term effect attributed to mini-budget in Bank of England research: about one-third of the initial yield jump - Remaining two-thirds due to market spiralling and technical factors Football pitch length regulation: 90 to 120 metres - Permitted range for an adult pitch Football pitch width regulation: 45 to 90 metres - Permitted range for an adult pitch Area of Wales: 21 billion square metres - Used for the football-pitch estimate Estimated football pitches to cover Wales: about 3 million - Using a typical pitch size
Pivotal Quotes: "Migrants will get half of all new homes." — Daily Express headline cited by presenter: The headline being investigated for accuracy "To equate the two and say that half of all the new build homes that we're building are going straight to recent immigrants is just preposterous." — James Riding: Response to the Conservatives’ housing claim "Wales is in a really dark place as far as children's reading is concerned." — Cathy Rastel: Assessment of Wales’s PISA reading results
Implications: Listeners should treat political headlines and headline statistics with caution, especially when they blend different time periods or concepts. The episode suggests Wales needs evidence-based reading reform, while UK bond costs reflect both past shocks and current global pressures.
About More or Less Behind the Statistics
Tim Harford and the More or Less team try to make sense of the statistics which surround us. From BBC Radio 4