A second strike by Ryanair pilots in Ireland in just over a week has forced the budget carrier to cancel 24 flights on Friday.

The axed services are on high frequency routes between Ireland and the UK to minimise the impact on families due to start summer holidays to Portugal, France, Spain, Italy and Greece.

Ryanair said a quarter of its 350 Irish pilots, members of the Forsa union, had opted to take industrial action on July 20.

The airline had to ground 30 out of 290 flights to and from Ireland last Thursday due to a walkout by pilots.

“This second strike is unnecessary because Ryanair has already given them written proposals that address their concerns about seniority,” the carrier said.

“We’ve offered to set up a working committee to explain all these issues to tis small minority and asked them to postpone the strike, but they have refused.”