BBC reporting the same
BBC News - BA strike: Unite union to ballot members if no progress
Unite said that it was giving BA until 29 June to "demonstrate that it is willing to negotiate a solution to the fresh issues between the parties - or will ballot its members for strike action".
It said the new issues under dispute were threefold: BA's use of other employees to cover as cabin crew; the removal of travel perks from crew who went on strike; and "vindictive, disproportionate and unnecessary disciplinary action" taken by BA against some of its crew members.
"Once again, we say to BA: Do not seek conflict," said Brian Boyd, Unite national officer for civil aviation.
"Drop the tough talk and work with us to deliver the change needed for the future and preserve the standards associated with this great airline."