Outside
So its a 24hr sby with no start / end times just an expectation to be there when called. Um what can i say apart from the individual either needs to report it to the Company (brave chap) put up with it, or leave. He / she surely can't be the only Pilot with the issue?.
As for the FOI "Ignoring" it absolutely not. I know two IO's (FOI side kicks) and they are boh ex Crewing bods so they know the tricks of the trade etc.
The other option is for your colleague to contact the CAA directly, pm if you want a contact at LGW HQ