in the UK during Summer Salatul Fajr ( Dawn prayers) can be as early as 2 am

its difficult to get up if you sleep late Prophet Muhammed peace be upon him adviced us to 'sleep early so we can wake up early' in the UK we can sleep only after Isha prayers which come at 11 pm in the summer but many scholars say we can pray before that since its the time of Isha also.