Site search is very memory consuming as it searches in real time, I believe, while Google searches cached versions, so there are pluses and minuses to both, which is why we have them both. There's a Google site search box, but it doesn't appear not to be working at the moment- I have contacted the Webmaster, who will do his magic and get it sorted. You'll find it at the top right of the screen. At the moment, very serious changes are going on under the bonnet because of the EU cookie law - you may have seen a bar and button appear - and things are changing inside to conform with that.
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