Shabbos Parshas Devarim (also Shabbos Chazon) starts in London at 8:10 tonight (candle lighting time) and ends at 9:23. For other locations, please check out Chabad.org’s amazing Shabbat times webpage! Also in London, the Tisha B’Av fast starts at 8:26 PM. I wish everyone fasting not only a tzom kal, but also an especially meaningful day on Sunday, which is, of course, Tisha B’Av. The fast ends at 9:02 PM on Sunday. Chabad.org has plenty of info on the day, but basically we abstain from joyous activities, and we fast. This is because it’s a day of mourning. There are quite a few laws surrounding the day, for example the prohibition of leather shoes, so I reccomend you take a look at Chabad’s “Mitzvah Minute”. You won’t regret it!
Shabbat Shalom and Tzom Kal!