Their onscreen rapport has played a key role in making the BBC ’s Springwatch such a hit. Now the duo are back, entertaining the nature-loving nation each weekday night on BBC2. But Michaela Strachan , has revealed that her relationship with fellow presenter Chris Packham , has not always run smoothly behind the scenes. "We have heated debates because Chris is the scientific one and I am the soft underbelly of wildlife telly who gets involved with the emotional storylines.’ Strachan, a