I was going to say; I don't think it's a wolf spider, don't they usually have more markings on them, such as this one? (we found him dead, unfortunately, in our pool when we went to Cyprus last year) - but the spider in question doesn't look too much like this one...
Dunno if this page would help? (it does look quite wordy... lol)
http://www.britishspiders.org.uk/index.php?page=cl


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