It was extremely bright, at least -7. Time of observation about 04:15 GMT Location: (41.4427°N, 1.9116°E).
Direction SE and altitude of about 30°, It seemed to be completely stationary, and the duration of the flare seemed way longer of what I am usually accustomed to see watching the ISS
What other objects can be so bright?
heavens above link of my location with known objects at the time