We are a family with 4 children. All EHIC cards are valid aside from youngest, who has her own card (not a dependent on ours). GOV website says I can't apply for a new one (GHIC) as she is under 16, and there isn't an option put her on my existing one (or make a new adult/dependent application).
Does anybody know how to get around this? I've exhausted Google! Thanks in advance!