There are real concerns around the breaks and the wheels on those trains.

What's important is that our public transport is safe.

That's why the trains have been repaired in record time.

We need to make sure public transport is safe - particularly aware of the horrific incident in Croydon with the tram.

The night tube won't happen unless it's safe. I've been reassured that we're on schedule for the final of the five lines to be opened in December.

If there's any doubt whatsoever about the night tube on the Piccadilly line not being safe it wont' go ahead.