Gatwick Airport staff who assist disabled passengers are set to vote on strike action amid a dispute over pay.
Unite said most of the 200 workers are paid £7.65 an hour – a salary which the union labelled “poverty pay.”
Its members have rejected three separate offers from their employer, the OCS Group, during a long-running dispute.
Regional officer, Jamie Major, said: "OCS doesn't seem serious about settling this dispute. At the last meeting management gave four separate options, none of which represented an improved offer in real terms.
"It is entirely unacceptable that OCS thinks it can get away with paying poverty pay to dedicated workers committed to assisting disabled and reduced mobility passengers."
The ballot closes on March 9, and Unite warned of "significant strike action", if there is a yes vote.
The Standard has approached Gatwick Airport for comment.
