oh well sort of :
nginx: [emerg] BIO_new_file("/etc/dehydrated/certs/voip.synthesis-it.co.uk/fullchain.pem") failed (SSL: error:02001002:system library:fopen:No such file or directory:fopen('/etc/dehydrated/certs/voip.synthesis-it.co.uk/fullchain.pem','r') error:2006D080:BIO routines:BIO_new_file:no such file)
nginx: configuration file /etc/nginx/nginx.conf test failed
cat: /etc/dehydrated/certs/voip.synthesis-it.co.uk/fullchain.pem: No such file or directory
cat: /etc/dehydrated/certs/voip.synthesis-it.co.uk/privkey.pem: No such file or directory
cp: cannot stat '/etc/dehydrated/certs/voip.synthesis-it.co.uk/cert.pem': No such file or directory
cp: cannot stat '/etc/dehydrated/certs/voip.synthesis-it.co.uk/chain.pem': No such file or directory
cp: cannot stat '/etc/dehydrated/certs/voip.synthesis-it.co.uk/fullchain.pem': No such file or directory
cp: cannot stat '/etc/dehydrated/certs/voip.synthesis-it.co.uk/privkey.pem': No such file or directory