Correct Dumbreck, its not constructive dismissal. Loss of non-contractual benefits is not related to terminating a contract of employment through underhand methods.
So Juan I doubt if anyone in the legal profession would agree.
As for staff travel and commuting, staff travel is not provided as a means for you to get to work, that is your own problem. If one chooses to use staff travel to get to work, thats their decision.
Staff travel is a perk, not a right.