International Airlines Group (IAG) has announced a significant increase in profits for the first quarter of the year, citing high demand for travel and lower fuel costs as key factors. The company, which owns British Airways (BA) as well as Aer Lingus, Iberia, and Vueling, reported an operating profit of €68m (£58.5m), surpassing expectations and a substantial improvement from the €9m (£7.7m)…