Would appear that it's also prevented the latest version of Woo Commerce updating.
My host told me
"you installed wordfence, and we are not responsible for bad coding from wordfence and you need to fix that on that plugin you installed
check for WordFence plugin settings and try to disable the ‘Disable XMLRPC’ feature of the plugin."
Options - More Options - and unchecking the XMLRPC box
has seemingly done the trick
