This is the official annual report and accounts for the Department for Work and Pensions for the year ended 31 March 2025. It sets out total DWP benefit expenditure, fraud and error estimates, and detailed breakdowns by benefit type and category for 2024-25. Any figure for benefits paid for conditions recorded as “unknown” in 2024-25 would need to be derived from the underlying fraud and error and benefit statistics referenced in this report, as this document itself does not highlight a headline figure of £770 million linked to an “unknown” condition category.

This annual series provides detailed breakdowns of UK social security benefit expenditure by benefit type, client group and reason for claim. However, the published tables do not include a category for claims where the medical condition is recorded as "unknown"; such granular diagnostic coding is usually held in underlying administrative systems and may only be released through Freedom of Information (FOI) responses or ad hoc statistical publications.

A House of Commons Library briefing on PIP statistics explains that DWP publishes data on PIP claims by main disabling condition, including a category labelled "unknown". The briefing notes that this category covers cases where "the primary disabling condition has not yet been recorded, is missing, or is coded in a way that cannot be matched to the published condition groups", and that expenditure by condition group, including the "unknown" category, can be estimated from the DWP tables.

In response to a parliamentary question on disability benefits data, a DWP minister explained that 'Main Disabling Condition is an administrative category recorded for operational purposes and in some cases may be recorded as "unknown" where sufficient information is not present at the time of processing.' The minister added that 'Benefit entitlement is determined by the impact on functional ability rather than the label of the condition, and there is not a distinct budget line for payments where the main disabling condition is coded as unknown'. No specific figure of £770 million for 2024-25 was cited in the exchange.

A House of Commons Library briefing on health and disability benefits explains that DWP administrative data include a field for 'main disabling condition', which may be left blank or coded as 'unknown' in some cases. The briefing comments that 'figures on main disabling condition should be interpreted with caution and are not directly used to allocate expenditure', and that 'headline expenditure on PIP, DLA, Attendance Allowance and related benefits is not normally broken down by named medical condition or by "unknown" condition category in official published statistics.' The briefing does not report any specific 2024-25 expenditure figure of over £770 million for beneficiaries with 'unknown' conditions.

Reuters reported that an FOI request to the Department for Work and Pensions had revealed that, in the 2024/25 financial year, welfare payments "running into the high hundreds of millions of pounds" went to claimants whose medical condition was recorded in internal codes as "unknown" or "not specified". The story noted that DWP described the figure as provisional management information, subject to revision, and did not provide a precise pound amount in its written response.

The article reports: "Around £770m in health benefits went to claimants with no recorded health problem last year, The Telegraph can disclose." It explains that this relates to Personal Independence Payment (PIP) and Employment and Support Allowance (ESA) cases in which the condition was logged as "unknown" or not properly recorded, based on Department for Work and Pensions (DWP) data obtained by the newspaper. The piece frames the figure in the context of a broader political debate about rising disability and health-related benefit spending under Labour.

An Institute for Fiscal Studies analysis of disability benefit spending uses DWP data to show expenditure on Personal Independence Payment and other benefits by main disabling condition group. The methodology notes the presence of a small share of cases recorded as "unknown or missing condition" in the administrative data and explains that these are included as a separate category when allocating benefit expenditure by condition.

The Telegraph reported that 'official statistics suggest that in the last financial year more than £770 million in disability and sickness benefits was paid to claimants where the main condition was recorded as "unknown".' The article appears to derive this figure by applying average awards to the number of cases coded as 'unknown' in certain DWP datasets, but it acknowledges that 'the department does not publish a formal breakdown of spending by diagnostic label and disputes that the "unknown" code means there was no medical evidence.' This is a secondary analysis rather than an official DWP expenditure category.

In a 29 January 2025 statement on the welfare cap, the Secretary of State for Work and Pensions referred to pressures from "health and disability-related benefits" but did not mention any spending on conditions recorded as "unknown". The focus was on the overall breach of the welfare cap and the aggregate increase in spending on disability and incapacity benefits, without disaggregated figures for claims coded as "unknown".

The IFS briefing explains that DWP’s disability and incapacity benefits systems allow for several condition codes, including a small residual category for cases where a specific diagnosis is not recorded or cannot be mapped to standard categories. It notes that this residual category is sometimes labelled "unknown" in internal data extracts, but warns that these cases can reflect administrative or timing issues rather than an absence of any medical evidence.

The Independent reports on the dispute over claims that Labour paid "more than £770m" in benefits for people with "unknown" conditions. It cites DWP clarification that the label "unknown" in its tables usually means that the health condition code was not provided or not yet entered on the system, and that all PIP awards still require supporting evidence and an assessment, even if the specific diagnosis code is missing from the published data.

A Commons Library briefing on disability benefits notes: "DWP holds information on claimants’ primary medical condition, coded using an internal classification. There is also a small proportion of claims where the condition field is recorded as 'unknown' or is missing. These are generally excluded from statistical breakdowns because of their small size and potential data quality issues." The briefing does not publish a monetary total for benefits paid to such cases.

The DWP guidance describes how benefit expenditure and caseload tables are compiled but does not identify any separate reporting line for claims with "unknown" medical conditions. It explains that figures are broken down by benefit type and sometimes by claimant characteristics, but health-related benefits are usually presented by programme rather than by diagnosis codes. There is no explicit reference in this methodology note to a category of spending for conditions recorded as "unknown".

This April 2025 report analyses trends in UK health-related benefits such as ESA, PIP and related programmes. It discusses the rise in claims due to mental health and musculoskeletal conditions, giving detailed breakdowns by diagnosis group, but does not highlight a significant share of spending assigned to an "unknown" condition category. Where diagnostic categories are missing or suppressed, they are treated as part of statistical disclosure control rather than as a distinct spending line on "unknown" conditions.

In a 2025 commentary on welfare spending, the Resolution Foundation notes that "non-pensioner disability and incapacity benefits" have risen by £24 billion since 2019–20 and examines the drivers of this growth. The piece discusses increases in caseloads and generosity of health and disability benefits but does not mention any substantial portion of expenditure going to claims where the condition is recorded as "unknown".

This 2025 report argues that the UK's welfare system needs reform to curb costs and includes discussion of rapidly rising health and disability-related benefit spending. It cites growth in spending on Personal Independence Payment and related benefits but does not provide or rely on a figure of £770 million being paid to claimants whose conditions are logged as "unknown"; diagnostic coding issues are not a central focus of the analysis.

The Centre for Social Justice's November 2025 paper describes a "ballooning welfare budget" and highlights rising costs of health and disability benefits. It lists the main drivers of expenditure increases but does not identify a discrete category of hundreds of millions of pounds being spent on benefit claims where the medical condition is coded as "unknown" in DWP systems.

Background knowledge: UK health and disability benefit statistics produced by DWP typically use standard diagnostic groupings based on ICD codes or similar classifications. A small number of cases may have missing, unrecorded or 'unknown' condition fields in administrative data, but these are not normally presented in public tables as a distinct, large financial line item; press references to hundreds of millions paid for 'unknown' conditions usually arise from internal accounting or coding artefacts rather than an official budget category.

The article claims that an FOI request revealed that "more than £770 million" in benefits was paid in 2025 to people whose condition was logged as "unknown". However, the piece does not reproduce the full FOI response or any official document, instead summarising figures said to have been obtained from the Department for Work and Pensions' internal database for disability benefits.