Virgin Atlantic claims to be launching the world's first glass-bottomed aeroplane.
The airline tweeted this picture showing how the service will look:
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Warm with some wet weather
Melissa Mead has been campaigning to raise awareness of sepsis after losing her one-year-old son William to the illness.
Last year, spring was colder than winter, with snow at the end of April for the first time since the mid 1980s.