Great question! The National Trust’s Family Membership covers:
Key details to remember:
What if you have more than 2 adults? If you regularly visit with more than 2 adults (e.g., two parents and a grandparent), you would need to upgrade to a Family & 2nd Carer membership or purchase an additional individual membership.
In summary: Your Family Membership allows you to take your own children plus others, up to a total of 10 under-18s, accompanied by at least one of the named adult members on any single visit. It’s one of the most generous and flexible family memberships available.
For the most official and up-to-date information, you can always double-check the National Trust’s website under their “Join Us” section.