Details TPO Experience Courses Work is currently being undertaken on arranging experience courses using the NVR's Traveling Post office set and details will appear here shortly outlining the course, the price and dates. For more details on our TPO Group and their activities take a look at their website www.tpo.org.uk Operating Dates To be announced All attractions subject to availability Every effort will be made to run the services shown but the company can accept no liability for the cancellation or late running of any train or other advertised service.