5 NEED-TO-KNOWS TODAY

1 to watch

RHS Chelsea Flower Show, BBC One, 7.30pm Nicki Chapman and Angellica Bell introduce opening day coverage.

1 to know...

Sir James Dewar, inventor of the vacuum flask, was born at Kincardine-on-Forth on this day in 1842.

1 to answer

Which “Dambusters” Victoria Cross winner was killed when his aircraft crashed in Holland today in 1944?

Birthdays

Sophia Loren, 87; Sir Jeremy Child, 77; Jose Rivero, 66; Gary Cole,

65; Kristen Johnston, 54; Julian Joachim, 47.

1 to listen to

5 Live Boxing, BBC Radio 5, 9pm Interviews and chat ahead of the Anthony Joshua v Oleksandr Usyk world title bout on Saturday.