http://www.bsaci.org/about/download-paediatric-allergy-action-plans
Also join the Anaphylaxis Campaign at https://www.anaphylaxis.org.uk/
https://www.allergyuk.org/information-and-advice/conditions-and-symptoms/33-anaphylaxis-and-severe-allergic-reaction
The needle of Epipen (or Jext or Emerade) has to be inserted and held in the muscle for 10 seconds to deliver the drug.