British Isle substrate

If there was a Semitic sub-strate in the British Isles, could this
have anything to do with it?:

from an old article in a 1935 school textbook "Foreign Lands And
Peoples" by J. Russell Smith (California State Series):

"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......Ships sailed from Phoenicia to trade with many countries
along the shores of the Mediterranean. They even went out into the
Atlantic and up to England to get tin; this trade in tin from Britain
was one of the early trades of the world."

-Michael