Afaik, The 14 year old does not need to be sat next tonan adult
Originally Posted by BA
It's recommended that children under 12 in Club Suite are supervised and not left unattended during the flight. Anyone over 12 may be seated separately. Children aged 2 and over in Club Suite must be in their own seat for take-off, landing and when the seat belt sign is on. Due to the layout of the Club Suite cabin, you may not be able to see your child during this time.
https://www.britishairways.com/conte...travel/seating