Look up to the skies … Galileo satellites help us navigate below

Tomorrow, satellites of Europe's Galileo navigational system are scheduled for launch into space atop a Russian-build Soyuz rocket, taking off from the spaceport in Guiana, South America.

These are the 9th and 10th such satellites - launching at 3.08am BST on Friday 11 September - and two more in the constellation are planed for launch by the end of the year. By 2020 the full system will consist of 26 functioning satellites, and six spares in orbit. The first navigational services will be offered to customers next year.