Mythology written in the middle ages, totally void of supporting evidence is still fiction - just like the abundance of other myths that developed in that time frame. That the phoenicians sailed as far as England doesn’t matter - fiction is fiction.
Ah, so you admit they sailed to England. Ok, here's a bible verse for you:
Jdg 5:17 Gilead abode beyond Jordan: and why did Dan remain in ships? Asher continued on the sea shore, and abode in his breaches.
Next questions: What types of ships were these? What was the tribe of Dan doing in them?