Do a cost analysis on how much a minute (if you even save that) it would be if the Hereford area was upgraded just for one train, it is a rediculous proposal, the money would be better spent upgrading the level crossings on the route so no one else is killed. The WAG express is dead in the water as the WAG will eventually come off their high horse and stop funding it.
It wouldn't be for just one train though! I'd look into other stuff too to make it worthwhile for more than just the one a day!