Budget: documents in full

Features

• IS in Europe: The race to the death

  Tuesday's devastating attacks in Brussels show IS's European network is still at large, despite a year of intensive efforts by security forces to close it down.

• Project Greenglow and the battle with gravity

  Scientists are debating whether it's possible to harness the power of gravity for interstellar space travel.

• The boy who refused to leave police custody

  The four-year-old boy who has become the centre of a controversy between India and Pakistan - and between his father and mother.

• The mirth and misogyny of Andy Capp

  Why, almost 60 years after he first appeared in the Daily Mirror, is a layabout lout from north-east England still so loved around the world?