If you are a WebhostUK Limited's customer and you want to access your cPanel then first logging in your Client Portal's area -> My Services -> Click green arrow icon on right side -> "Scroll down and click "Login to cPanel"
Alternatively to access the cPanel - via secure or normal connection. Note that in case your ISP(Internet Service Provider) filters the connection and blocks the standard secure cPanel port (2082 or 2083 ), you will have to use the normal connection.
http://www.yourdomain.com:2082 (for normal connection)
http://www.yourdomain.com:2083 (for secure connection)