This topic has been moved to
How stuff works.
http://www.firstgreatwestern.info/coffeeshop/index.php?topic=26479.0What started off as an innocent little "please check my fare" resulted in the passengers being denied groupsave, contrary to all descriptions of how groupsave works online.
This in now a systemic issue, with
GWR▸ imposing unpublished rules onto unsuspecting passengers on the train, at a point where the passengers cannot decide not to buy the product when the price for the group is £10 higher than they had budgeted. I have moved the topic to our "technical interest" area for Transport Scholar members and I will come back here and give a summary update in due course.