The University has two new travel management providers - Diversity Travel and Key Travel through which you can book hotels and travel. Both suppliers are setting up accounts across the University. Please speak to your department administrator to see if Diversity and/or Key Travel have been implemented in your department.
For train travel, you have to book with your department's selected supplier. For hotels and air travel, you can choose either supplier. To help you decide which to use, take a look at Diversity Travel's features and benefits (.pdf) and Key Travel features and benefits (.pdf).