ECB member Ewald Nowotny comments in an interview with Der Standard

  • Slow increase in rates would not harm the EU economy
  • A hard Brexit may bring a slow decline in the UK as they rely on services more

With the ECB pretty much fixed on the timeline of "through the summer of 2019", it's not likely we'll see anything faster than that. And either way, unless Draghi makes a comment like this, it's very much passable and to keep in the back pocket.