Picket lines have been mounted outside airports
Several flights to and from Scotland have been cancelled as British Airways cabin crew strike for a second day.
Twenty-five flights between London Heathrow and Aberdeen, Edinburgh and Glasgow have been grounded.
The four-day stoppage, which began on Saturday, is the second round of industrial action by Unite members over proposed changes to pay and conditions.
Passengers have been advised to consult BA's website for details before travelling to airports.
Cabin crew held a three-day strike last weekend, and picket lines have again been mounted outside airports.
Seven flights between London Heathrow and the Scottish airports were cancelled on Saturday.
A further 38 have been called off on both Monday and Tuesday.
Flights will also be cancelled following the end of the strike - 19 on Wednesday and 10 on Thursday.
Flights between Scotland and London Gatwick and London City airports are unaffected.
A passenger waiting at Heathrow, Elizabeth Larnach, said she fully supported the striking staff, despite her flight to Glasgow being cancelled.
Mrs Larnach, who had travelled from Australia with her two teenage children who are competing in the World Irish Dancing Championships in Glasgow, said she did not think BA staff were paid enough.
She said: "Their pay compared to Australian standards is lousy.
"When I converted it into Australian dollars I thought there's a lot of Australians who wouldn't work for that."
She added: "We found out a few days ago our original flight was cancelled but we're going on an earlier one that actually suits us better."
'Keep flag flying'
Willie Walsh, British Airways' chief executive, said: "The vast majority of British Airways staff, including thousands of cabin crew, are pulling together to serve our customers and keep our flag flying."
BA said in a statement: "Our aim will continue to be to fly as many customers as we can during the second part of the biggest contingency plan we have ever launched."
But a spokesman for Unite said "bullying" by BA had backfired.
"Heavy-handed attempts to scare cabin crew back to work - including withdrawing their travel assistance, deeming sick workers as strikers, and docking crew wages for days which are not strike days," were not working the union said.
"Sadly passengers are suffering from BA's hyped-up claims to be running a functioning operation as dozens of flights were cancelled yesterday," he added.
Unite has said no further action would be taken before 14 April, giving a window of opportunity for fresh talks.