There is some thought that haemophilia B is less clinically severe than haemophilia A. With this survey we'd like to understand more about how you assess and manage haemophilia B. The results may be used to develop nurse and patient educational resources. This questionnaire should only take you around 6 minutes to complete. This project is facilitated and funded by Sobi. This survey is anonymous, and any information collected in this survey will be shared only with Haemnet and Sobi. The information will be used to support education around haemophilia. The survey will be kept for as long as required for the purpose of the project, not longer than 12 months.