THE BRITISH SOCIETY FOR IMMUNOLOGY

Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers

Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.

Accounting basis

FRS 102

Reporting scope

Consolidated group

Auditor

Moore Kingston Smith LLP

Audit opinion

Unqualified (clean)

Going concern

Affirmed

“In auditing the financial statements, we have concluded that the trustees' use of the going concern basis of accounting in the preparation of the financial statements is appropriate.”

Group structure

1. THE BRITISH SOCIETY FOR IMMUNOLOGY · parent
   1. BSI Trading Limited 100% · England and Wales · management of corporate membership, sponsorship, exhibition, training and other trading activities for the Society.
   2. The United Kingdom Primary Immunodeficiency Network 100% · England and Wales · advancement of health among those with primary immunodeficiency disorders and advancing education in PID and related subjects.

Significant events

• “At the end of June 2025, we had over 5,000 members, our highest ever membership”
• “The two-day BSI-CIPN conference took place in Birmingham during December 2024. The event attracted over 270 participants from across the UK.”
• “In June 2025 the BSI Bristol Immunology Group held the immunology of long-haul disease event highlighting immunological mechanisms that evolve during the development and progression of disease.”
• “Professor Leonie Taams stepped down as Editor-in-Chief in December 2024, the BSI thanks her for successful leadership of the journal.”
• “Professor Claudia Mauri joined as the new Editor-in-Chief.”
• “In March 2025, we ran a high-level Cancer Immunotherapies Summit at the Royal Society in London.”
• “In November 2024, we hosted the first ever BSI Immune Therapies Summit, bringing together senior leaders from industry, academia and clinical spheres to discuss the latest developments in immune therapies.”
• “In April during World Immunology Week, the BSI was delighted to co-host a successful parliamentary event in Westminster with Results UK, a charity who advocate for immunisations for all...”

Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers

Filings

8

last 12 months

Capital events

0

last 24 months

Officers appointed

2

last 12 months

Officers resigned

1

last 12 months

Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.

• Turnover

  -22.2%

  £2,025,000 → £1,575,000

• Cash

  -17.7%

  £734,000 → £604,000

• Net assets

  -16.8%

  £3,737,000 → £3,109,000

• Employees

  +5.6%

  18 → 19

• Profit before tax

  -15.2%

  -£499,000 → -£575,000

• Wages

  +2.3%

  £1,056,000 → £1,080,000

Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers