Was Sebastian Cabot successful in English exploration?
No. He left 1508 and did not find the north-west passage to Asia as he hoped. The success of his father was lost as the Spanish and Portuguese took over from the fishing grounds he had founded.
Who were the main competitors to England for the metal industries?
Germany and Bohemia. They had better metallurgy (extraction and refining of metals) and the Spanish and Portuguese were superior in ship building. England remained unable to compete with these countries.