Eroski: Dumpsters are at the back on the outdoor parking lot, but a lot of employees are around during the day and at night there is a security guy forbidding the access of the parking. Hard to get anything from there.
Morrisons: They leave the dumpsters along the back right hand side of the store next to the road. Those dumpsters are outside around 9pm. A lot of milk products and other stuffs. No dumpsters on Saturdays.