If all the travellers are on the same insurance policy, all of them are united together. Therefore, they can all cancel their trip within the limit of 9 travellers or limitless as long as they belong to your household!
For example: you plan a trip for your whole family. Unfortunately, a child is involved in an accident and the whole family would prefer to cancel the trip and to stay with the child.
The whole family will be reimbursed!
Please be aware that this only applies on the condition that the reason for cancelling is covered!
This answer only relates to: Cap Cancellation.