As a Mancunian working abroad, I was interested to read the article in BSJ August about the new court building in Manchester.

I realise that in the past we have produced some impressive feats of engineering in the North-west, but I can’t wait to see the four 440m3/s AHUs that have allegedly been installed there. They must be absolutely massive, or could it be just a case of a missing decimal point?

Brian Hodgkinson, Amman, Jordan Just plain wrong. The correct figures are four AHUs, each providing 14m3/s – Ed.