In 2017, the UK Cancer Genetics Group (UKCGG) and UK Genetic Testing Network (UKGTN) held a workshop which led to a consensus for UK cancer gene panel testing.1 The agreed breast cancer panel included BRCA1, BRCA2, PALB2, ATM, CHEK2, PTEN, STK11 and TP53. This evidence concerns the gene CHEK2 and cancer.