Passengers who buy a return ticket and travel for at least 1,300km each way will receive a 20 percent discount, according to the company. If they buy the ticket at least 60 days in advance, the discount will be 36 percent.

Discounts on return tickets for shorter journeys are 10-20 percent if tickets are bought 15-60 days beforehand.

In addition, the corporation will give 7-13 percent discounts on tickets for groups of 20-49 people and a 15 percent discount for groups of 50 people or more.