British astronaut Tim Peake prepares for spacewalk
Tim Peake is set to carry out the first ever spacewalk by an "official" British astronaut.
Major Peake and Nasa astronaut Tim Kopra are scheduled to step outside the International Space Station at 12:55 GMT.
They will replace a faulty component on the station's exterior, which has compromised a power channel on the outpost.
Pallab Ghosh reports.