Hundreds of Border Force officers at Heathrow Airport are set to launch fresh strikes in a dispute over rosters.

The Public and Commercial Services union (PCS) said more than 500 of its members will walk out on May 31, June 1 and 2.

They will also refuse to work overtime for three weeks from June 4.

The officers, who work in terminals 2, 3, 4 and 5, took four days of action last month.

There could be some disruption in and out of Heathrow for travellersGetty

PCS general secretary Fran Heathcote said: "We are keen to resolve this dispute but the Home Office must first put something on the table for our members to consider.

"The Home Office has said it is ‘open to discuss’ a resolution but it only responded to our request for a meeting after we threatened further action.

"Until it comes back with changes to the roster that will benefit our members then the dispute will continue."

Meanwhile Seafarers at the Royal Fleet Auxiliary (RFA) will strike on Sunday in a dispute over pay. The Rail, Maritime and Transport (RMT) union said more than 500 of its members will walk out for the day in protest at a 4.5 per cent pay rise.

There may be delays at Heathrow Airport

RMT general secretary Mick Lynch said: "RFA members have reached their tolerance limit towards poor pay and conditions for UK seafarers despite the vital work that they perform.

"Management has remained inflexible throughout the negotiations and has failed to present an improved offer that meets our members’ expectations.

"RFA must acknowledge the gravity of the situation and avoid a crewing crisis by showing respect for the role and sacrifices of merchant seafarers, who play a crucial part in long deployments away from home on operations worldwide.

"We have made efforts to reach a negotiated settlement with management, but now we have no choice but take strike action."

RMT general secretary Mick Lynch