The action will run until 7am on Friday (Credit: iStock)
Around 600 officials had been due to walkout earlier this month but the action over 11-14 April was called off to allow the Public and Commercial Services union (PCS) to resume talks with the Home Office.
However, fresh action was called just a few days later to give PCS members the option to strike should the talks “not bring a satisfactory resolution” to the current dispute.
PCS members staffing passport control at Heathrow terminals two, three, four and five walked out at 5am on Monday (29 April) and will return to work at 7am on Friday (3 May).
Fran Heathcote, PCS general secretary, said it was disappointing that despite talks last week, the Home Office had been unprepared “to grant any flexibility to their new roster”.
The union claims the new arrangements are “unworkable”, limiting its members flexible working arrangements, and would force around 250 members out of their jobs.