The Duchess of Cambridge's grandmother worked as a civilian member of staff at Bletchley Park, where code-breakers were credited with shortening the Second World War by at least two years.
Documents from October 1944 show she worked, alongside her twin sister Mary, probably as a duty officer.
Miss Glassborow married Second World War Mosquito pilot Peter Middleton in 1946 and went on to give birth to Michael, Kate's father.
Kate's paternal family tree can be traced back to Henry VIII through Elizabeth Knollys, who was not only the great-niece of Henry VIII’s second wife, Anne Boleyn, but also almost certainly the illegitimate granddaughter of Henry himself.
More top news
Penalties of £100 or a court fine of up to £1,000 can now be handed to anyone caught lighting up in a private vehicle with someone under 18.
Bodies are being buried in backyards and overwhelming morgues as officials try to find another plot of land to lay them to rest.
Authorities have warned that the death toll is likely to rise as much of the building is yet to be searched.