On 16 June 2017 a Bombardier DH8-400 inbound to Vienna and an Airbus A319 which had just departed the same airport lost separation in the vicinity of 7,000 feet in Class ‘C’ airspace whilst under radar control. Both aircraft responded to their TCAS RAs and minimum separation was 1.2nm laterally and 300 feet vertically - less than half the prescribed separation. The conflict followed an unintended instruction to the DHC8 to turn right rather than left onto a heading of 270°, the controller’s failure to recognise this and, finally, the inappropriate instruction to the departing A319 to resume its climb.