Many thanks for your super rapid response, greatly appreciated. The fix is working for text in the tab but not for content called by shortcode in the tab as far as I can see. I’ve just published a dummy product using the new table system the client is using (the table is called with shortcode in the tab), cleared the cache, reindexed then done a search for text in the table and it didn’t find anything.
http://www.lawtontools.co.uk/en/product/dummy-product/
searched for ABC-123