Looks like a tissue to me in the side bin. Like someone else said, there would be a string. Furthermore, even if it were a tampon, it appears unused/clean so is essentially compressed cotton. Obviously it shouldn't be there and should have been cleaned up, but it's hardly the end of the world. Nor is a wrapped sanitary pad or sticky spilled coke (e.g.). The OP was in no way impacted by this beyond having to pick up the pad and throw it away before using the drawer. Doesn't seem to be a basis for compensation to me. However, it might be worth pursuing it anyway as BA wil have to fight back and if enough people are bothering them about cleaning, they might decide to do something to improve teh situation.