London's St Paul's and Westminster Abbey are national monuments and also active churches. During certain published times they are closed to the public and at other times they are open to tourists. Churva is a synagogue and must be used as such, but there should be set times when it is open to tourists as well. Obviously, Jewish tourists can also take part in prayers.
U.S. says working on initiative to de-escalate Syria fighting, with focus on Aleppo (Reuters)
from the article: If the Vilna Gaon was right, the 3rd Temple is on its way