If you are told to travel from one office to another though you should be paid for your time
This is actually law in the 'states. If you need to travel further than your normal commute you are paid for your travel time from your normal location to the new one and if you drive your milage is paid at a rate of 67¢/mile off the top of my head. I worked IT at a rural bank for a while and had to expense my milage pretty often as I went to branches 30-50 miles away to swap computers and whatnot