No problem at all Nigel, my experience has been the opposite in the course of my work most probably due to the qualification you stated. One example that springs to mind related to what was meant by the word "flooded" in relation to a pipeline, one interpretation meant that work could proceed immediately (The interpretation as understood by the Contractor) another interpretation meant a delay of 36 hours (The interpretation as understood by the Client). The Contractor's understanding was the one acted on as:

1: The Job was lump sum;
2: The work was not finished;
3: The risk was the Contractors;
4: The Client had yet to signed off and take charge of the pipeline in question.

For the Client's understanding the word used in their job specification should have been "filled" not "flooded".