You say that BCIS has developed a cost system “based on the price of petrol per litre” and that this results in a cost for the UK of “around £900 per square metre” (Petrol enters the cost equation at the BCIS, QS News, 11 August).

I don’t know where you or BCIS get your petrol from, but it’s a little more than I’m paying.

Is this London prices?

Roland Finch, via website