mirror.bytemark.co.uk must run ftp on 21 otherwise 'Bytemark Mirror: FTP failure'.

https://auth.bytemark.co.uk/status must run https with status 200 otherwise 'Bytemark xmlrpc auth-server down?'.

ssh.steve.org.uk must run ssh on 2222 otherwise 'SSH failure'.

http://www.taxcafe.co.uk/_db/ must run http with status 200 with content 'OK' otherwise 'taxcafe failure'.