evidence for early Phoenician presence in Britain?

Hi, I found this in my Grandma's 1933 elementary school
textbook "Foreign Lands and Peoples" (California State Series).
page 50 reads:

"A block of tin tells a tale. A few years ago some men were
digging a foundation for a building in a city on the south coast of
England. The earth was very soft, so they dug down and down to find
a firm foundation. After going down for many feet, they came to
something that seemed like a floor of strong oak planks. It was the
deck of an old ship. The place where the city stood had once been a
harbor. The ship had sunk in the harbor, and the harbor had been
filled by mud brought by streams. The men cut through the deck of
the sunken ship and found that the ship was still loaded with blocks
of tin.
The writing on the blocks of tin in the old ship buried beneath
the English city showed that it was a Phoenician ship."

Does anyone know any further information about this find? Is there
any linguistic evidence for possible Phoenician loanwords in
Brittonic to add support to this?

-Michael