Mark Twain famously said that a mine is a hole in the ground with a liar at the top. It follows then, that if you want to invest in mining you should get someone who knows what they are doing to do it for you.

Almost no one on, or indeed in, the earth is as good at that as Graham Birch, manager of the hugely successful BlackRock World Mining Investment Trust.

It also follows that if you really want to get to the bottom of it then get another expert to ask him. So here is Andrew Pitts, the multiple award winning editor of Money Observer magazine.

Research: BRWM.L

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