I really don't like to see HTML like this:
... style='visibility:hidden' height=0 ..
There may be a legitimate reason for it, but IMO it's quite likely to
generate a false positive for hidden text even if it's actuallz benign.
You have 288 validation errors:
http://validator.w3.org/check?uri=ht...ampspecs.co.uk
At the very least, you should fix the Google verification metatag by
chopping the " /" out of the back.