Thanks to all, I am wondering if there is a "legal" way to enter the loungeat age 16 even though it strictly says on the AA website that "any cardholder of age eighteen (18) or above may access the lounge). On my trip next month I have an overnight layover at Heathrow and I am staying at the sofitel hotel near the airport. Also there, staying at the hotel is permitted only from 18 and above, but there was an option for a minor to make a reservation if parents/guardians to fill out a form which gave me permission to stay at the hotel.
Does anyone know if there is a similar option in the case of lounge access?