I often wake up after the time

Q: It is known in Egypt that the Adhan for Fajr (Dawn) Prayer is made twenty minutes before its due time. So, if Iqamah (call to start the Prayer) is declared before the break of Al-Fajr-ul-Sadiq (true dawn) and the Imam commences Salah during which the time of Al-Fajr-ul-Sadiq becomes due, will I be permitted to join the congregation in such circumstances?

A: If it is established that the Imam offers Fajr Prayer before the break of Al-Fajr-ul-Sadiq, then it is not permissible to perform Salah behind him either in the first or the second Rak`ah (unit of Prayer) as, in this case, the Salah is invalid.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.