I am aware that the partner I work with is going through some personal difficulties. This is having a knock-on effect as his mind often seems to be elsewhere and he is leaning heavily on me to do some fairly complex legal work that is only just within my level of competency and sometimes – in my view – threatens to stray beyond it.

Whenever I ask him about it, he says not to worry. I don’t want to go behind his back, not least because he is popular within the firm. But then again, I don’t want to be at the centre of a negligence claim that could ruin my career. What should I do?