Today the London Waterloo to Corfe Castle train departed 06.35 from Waterloo and arrived at Salisbury 08.10,but according to the National Rail app it was cancelled for the remainder of the journey west of Salisbury owing to 'a shortage of train crew'. This would have meant passengers wanting to get to Corfe Castle would have changed at Salisbury for Southampton Central,then Southampton Central to Wareham before taking a bus from Wareham to Corfe Castle or Swanage. It is the third time this train has not reached its advertised destination. The May 25th train was terminated at Yeovil Junction whilst the June 8th service was cancelled due to the RMT strike action. With such cancellations Swanage Railway are bound to lose out on additional visitors,particluarly those from north Dorset and south Somerset wanting to visit the Purbecks without having to drive there or use the Dorchester South services to Wareham and the bus to Corfe Castle. Rostering of train crew must be guaranteed so that the service can operate without any issues of guard or driver availability. It is a matter of concern for potential passenger numbers who may decide to take the more direct London Waterloo-Weymouth services if departing from stations east of Salisbury or changing at Salisbury for Southampton Central if travelling from Gillingham (Dorset),Tisbury or Andover.