You see that mill, just above Overton Station ?

- Overton Mill - OS
Chances are - 99% of people reading this forum would have had one of its products in their possession. That's not a bad statistic
"Henry Portal founded Portals Paper Mill at Bere Mill, on the River Test between Overton and Whitchurch, in 1712, adding Laverstoke Mill to his enterprise seven years later, which allowed him to win the contract to make banknote paper for the Bank of England in 1724. Portals significantly expanded in the 20th Century with the development of a new Overton Mill near Quidhampton in 1922 and the Bank of England relocated a significant number of employees to the area during World War II.
Papermaking is still undertaken within the village at the Overton Mill which produces high-security paper for over 150 national currencies."
https://en.wikipedia.org/wiki/Overton,_ ... apermaking
And also - those who have had a drink or two of Bombay Sapphire might be interested to know that it's distilled just down the road at Portal's other (former) mill at Laverstoke.
"The site was leased by Henry Portal in 1718 and converted into a paper mill, becoming part of the Portals business. In the 1720s, Portal obtained the contract for the supply of paper to the Bank of England for use in banknotes, and the production of paper for currency and other secure uses would become the main use of the site. The site was expanded in 1842, and again in 1881, to allow for increased production. In 1860, new buildings, including the large India House, were built for a contract for the supply of paper for the Indian Rupee.
The mill was purchased by the Bombay Spirits Company in 2010. The new owners refurbished the site, reusing existing buildings for distilling and a visitor centre, cafe, bar and shop. New glasshouses, designed by the Heatherwick Studio, were constructed to display examples of the plants used for the gin botanicals. The River Test, which had been covered over as the mill expanded, was opened out to become a feature of the site again."
https://en.wikipedia.org/wiki/Laverstoke_Mill
Bombay Sapphire distillery
User:Keri, CC0, via Wikimedia Commons