1. UK National External Quality Assessment Scheme for Immunocytochemistry and In‐Situ Hybridisation London UK
2. Department of Epidemiology and BiostatisticsAmsterdam UMC, Vrije Universiteit Amsterdam Amsterdam The Netherlands
3. Department of PathologyRoyal Liverpool and Broadgreen University Hospitals Liverpool UK
4. HSL‐Advanced Diagnostics London UK
5. Department of PathologyRoyal College of Surgeons in Ireland, Beaumont Hospital Dublin Ireland
6. Oncology, Haematology and Cellular PathologyGuy's and St Thomas' NHS Foundation Trust London UK
7. Department of PathologyAmsterdam UMC, Vrije Universiteit Amsterdam Amsterdam The Netherlands