Are these two men related? That is the question dominating the minds of many of our readers to judge by this week's postbag.

Well, they both wear glasses, but in truth, we erred last week in illustrating both Patrick Walker's (left) comment article and the feature on Shell's in-house team, led in the UK by Richard Wiseman (right), with the same photograph.

We are happy to confirm that Mr Walker has no designs on Mr Wiseman's job and that we are not party to Hammond Suddards Edge's efforts to take over the world.