Though this would have been suicidal when Henry came to the throne in 1485 due to the reliance of Antwerp as a trade hub, a series of successful trade treaties during 1486 - including with France and Brittany that removed all Anglo-French trade restrictions - as well as the Treaty of Medina del Campo (1489) diversified English trade routes and provided Henry the breathing room required to hold the English trade through Antwerp hostage in order to negotiate the removal of Burgundian support for Warbeck.
Though this would have been fatal when Henry came to the throne in 1485 due to the reliance of Antwerp as a trade hub, England benefited from successful trade agreements with France and Brittany in 1486, which removed Anglo-French trade restrictions. The Treaty of Medina del Campo (1489) further diversified English trade routes, giving Henry the leverage to use Antwerp as leverage against Burgundian support for Warbeck.