On Friday 20th March 2015 there will be a near-total Solar Eclipse in London, in shaa' Allaah. In accordance with the Sunnah, there will be an Eclipse Prayer (Salaat al-Kusoof) held at the masjid from 9:15am.
This prayer consists of two raka'ahs of prayer, but with two rukoo's in each raka'ah. So there will be two recitals of Surah Faatihah with four other surahs.

In London, the eclipse begins at 8.24am, reaches its maximum extent at 9.31am, and ends at 10.41am.
Further information about the Eclipse Prayer can be found at : http://islamqa.info/en/6111