More than 500 Border Force members of the Public and Commercial Services (PCS) union are to take a further three days’ action in a dispute over a new roster already imposed.

The PCS said walkouts “will disrupt passport checks for travellers coming into the UK at Heathrow”.

Strikes are scheduled for 31 May and 1 and 2 June. This will be followed by three weeks of action “short of a strike” that will include a work to rule and overtime ban running from 4 to 25 June.

The PCS said action on 29, 30 April, 1 and 2 May was “well supported”, with members “clearly in favour of further action should there be no movement from the Home Office”.

The union added: “Following the end of the last strike action at the beginning of May, we wrote to the Home Office again highlighting the many problems raised with the new roster system and reminding the employer there remains widespread disquiet and anger from members over this.

“We have set out to the Home Office that we are keen to try to find a resolution. But it was only following the threat of further strike action that the Home Office has only just indicated they are willing to meet.

“However, as yet there’s been no consideration of the impact of the new roster on staff nor has the employer come back with any proposed changes. Therefore, as it stands the action will go ahead.”