It's an interesting point you make about Silver Y records in 2017, Chris. It's been the third worst year here for the species. As a matter of interest, Im setting out my annual totals below:
2007 47, 2008 20, 2009 89, 2010 114, 2011 16, 2012 18, 2013 50, 2014 9, 2015 5, 2016 21, 2017 11