An emergency release barrier system comprising: a post having at least one retainer; and a barrier tape having a cooperatively shaped attaching part formed at an outer end of the tape; wherein: the retainer is open at an upper end, has a first vertical retaining wall at a first side, a second vertical retaining wall at a second side, and a vertically extending opening formed between the first retaining wall and the second retaining wall, such that a vertically extending retaining volume is formed between an inner wall of the retainer, the first retaining wall and the second retaining wall, and a maximum width of the retaining volume is greater than a width of the opening; and the attaching part of the barrier tape is cooperatively formed to be removably mounted in and retained in the retaining volume of the retainer; characterised in that: an outer end of the attaching part is formed of a first flexible wing at a first side and a second flexible wing at a second side, the first and second flexible wings (22, 23) being compressible in a direction towards one another; the attaching part is formed such that when the attaching part is located within the retaining volume the first flexible wing engages with the first retaining wall and the second flexible wing engages with the second retaining wall; wherein, the first and the second retaining walls (13, 14) are substantially straight and angled towards one another; and the first and second flexible wings (22, 23) can be compressed towards one another by pulling the barrier tape outwards to remove the attaching part from the retainer such that a maximum width of the attaching part is less than the width of the opening. a post having at least one retainer; and a barrier tape having a cooperatively shaped attaching part formed at an outer end of the tape; wherein: the retainer is open at an upper end, has a first vertical retaining wall at a first side, a second vertical retaining wall at a second side, and a vertically extending opening formed between the first retaining wall and the second retaining wall, such that a vertically extending retaining volume is formed between an inner wall of the retainer, the first retaining wall and the second retaining wall, and a maximum width of the retaining volume is greater than a width of the opening; and the attaching part of the barrier tape is cooperatively formed to be removably mounted in and retained in the retaining volume of the retainer; characterised in that: an outer end of the attaching part is formed of a first flexible wing at a first side and a second flexible wing at a second side, the first and second flexible wings (22, 23) being compressible in a direction towards one another; the attaching part is formed such that when the attaching part is located within the retaining volume the first flexible wing engages with the first retaining wall and the second flexible wing engages with the second retaining wall; wherein, the first and the second retaining walls (13, 14) are substantially straight and angled towards one another; and the first and second flexible wings (22, 23) can be compressed towards one another by pulling the barrier tape outwards to remove the attaching part from the retainer such that a maximum width of the attaching part is less than the width of the opening. the retainer is open at an upper end, has a first vertical retaining wall at a first side, a second vertical retaining wall at a second side, and a vertically extending opening formed between the first retaining wall and the second retaining wall, such that a vertically extending retaining volume is formed between an inner wall of the retainer, the first retaining wall and the second retaining wall, and a maximum width of the retaining volume is greater than a width of the opening; and the attaching part of the barrier tape is cooperatively formed to be removably mounted in and retained in the retaining volume of the retainer; characterised in that: an outer end of the attaching part is formed of a first flexible wing at a first side and a second flexible wing at a second side, the first and second flexible wings (22, 23) being compressible in a direction towards one another; the attaching part is formed such that when the attaching part is located within the retaining volume the first flexible wing engages with the first retaining wall and the second flexible wing engages with the second retaining wall; wherein, the first and the second retaining walls (13, 14) are substantially straight and angled towards one another; and the first and second flexible wings (22, 23) can be compressed towards one another by pulling the barrier tape outwards to remove the attaching part from the retainer such that a maximum width of the attaching part is less than the width of the opening.