sleaford navigation hi steve i have written quite a lot of the article about the sleaford navigation do you know if the information about the lock sizes is published anywhere both skempton and boyes russell mention that they are x ft wikipedia is about verifiability so without a source i would not want to alter it i note that the infobox mentions that the current size is ft and cumberlidge confirms that i was hoping that your website might mention it but sadly that doesn't either