Your employees travel more cheaply on public transport.
Car journeys and flights are generally more expensive than train travel. For instance, it costs just 15.4 centimes to travel one kilometre with a 2nd class GA travelcard (based on 25,000 km/year).
Your employees can also make good use of their travel time. There are plus points for you too: more productive employees as well as favourable conditions and attractive side benefits.