DD16 has been invited on a UK city break with her friends Mam. Girls are sharing a room and we will pay for DDs flight. DD will have her own card with money for whatever she wants to buy. How much should I give the Mam to cover food etc? Not sure what the set up is regarding meals at the minute. Girls might just do their own thing ( fast food) so even a token amount as a thank you for Mam..