This may be a really daft question, but I'll ask it anyhow ...
If Bachmann are viewing Hatton's as a manufacturer, and therefore as a competitor, and thus refusing to have them as a seller of their products; could Hornby and Heljan and Dapol all do the same such that Hattons just end up as a manufacturer/wholesaler as they would then have nothing much to sell in their shop as all the other manufacturer's would also view Hatton's as a competitor?