They were a family of four. Mother, father, and two adolescent children, a boy and a girl. They were sitting at a table for four, close to where Richard and I were enjoying our own Sunday pub lunch . But there was no danger of their conversation cutting across our own; no risk of raucous laughter disturbing the air around them.

They sat in total silence. Not only were they not talking - not a single, solitary peep from one of them - they weren’t even looking at each other. But this was no family at war. No brooding, angry silence following a row. The four of them were fully occupied; not with the food before them (they’d finished their main course and were waiting for their plates to be cleared); not even with a Sunday newspaper and its sundry supplements.

Prince William says when he'l

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