By Guy Taylor Crisis-hit Harland and Wolff has secured an additional £19.5m from its US lenders as it battles to stave off administration. The Belfast shipyard, which built the Titanic, said it had entered into agreements with its existing lenders to increase its credit facility by $25m (£19.5m), bringing the total to $140m. It comes after the Financial Times reported the firm had been holding last ditch talks with its Wall Street backer Riverstone Credit Partners throughout the last fortnight. It is thought a condition of the agreement had been the departure of John Wood, chief executive, who…