Slightly different angle on this.

I've found a glitch on a BA CW fare that's showing as £548 return (when it should be about £2,000 more)... after clicking through, it's not available (is around four times more).

I'm kind of wondering why this happens in the system at all and whether a TA might be able to find the super-low fare legitimately? Or if it really is nothing more than a glitch?

Thanks