London Sentinal used to be large paper but , was stripped down from National to a local London paper about three years ago.They are now linked to the Echo Sentinel and will merge fully with this paper by the end of the year.
From publications it looks like the Echo will do the real big (inter)national news and sports, society, entertainment and so on will be done in the sentinal. Right now they're still published under London Sentinal don't know if that will change was the merger is fully completed.
Hope this makes sense. I tried to explain as best as I understood from what I was told lol
Echo Sentinal