Ryanair boss Michael O'Leary says UK summer holidays are at risk as the Iran war sparks a jet fuel crisis, which could potentially force mass flight cuts by early June Ryanair boss Michael O'Leary says UK summer holidays are at risk as the Iran war sparks a jet fuel crisis, which could potentially force mass flight cuts by early June Ryanair may need to cancel 10% of its flights this summer, its CEO has warned, if ... [3064 chars]