The answer has to be site diaries maintained by all supervisory staff from trade supervisor upwards. There should be an item in the bill for them, their content specified in the spec and, for programmes using the Society of Construction Law protocol, a withholding of a percentage of the account if they are not forthcoming. Gathered by the main contractor, they should be passed to the client every Monday morning for review and, as appropriate, action.

Andrew Farrer, TLD Projects, via email