I was going to do this online a few days ago as I found the JL flights I needed on the ba.com website but at the last minute decided to do a 4 day layover in Tokyo. Of course, although I can see availability on the website, I can't book online with an extended layover so I had to call to get this done. Wasn't charged the phone booking fee as I hoped. Hefty JL YQ fees though. Even more since the 1st of August.