Extra points will be awarded for correctly orientating the drone and a slow final approach.

BBC: Esa seeks help to control robot spacecraft

The Economy Ministry said this was down to the country "continuing its marked process of re-orientating its sales to other markets where the economic outlook is more favourable, such as the Middle East, Africa and United States".

BBC: Spain reports trade surplus as imports slump

Prof de With and his team found that by attaching these molecules on the end of polymer "stalks" and mixing these throughout the coating, any that are removed by scratches are replaced by a new, self-orientating layer.

BBC: Coating heals itself after damage