The electronics area has many things, including but not limited to:
The idea of the small components drawers is that you can take small items for your projects for free. Larger items like microcontrollers might be priced at £1 or so which you can donate in the donation box when you take them.
In that manner, here is a list of things that might want restocking soon. Please add to the list as you take things and notice that drawers are empty.