Our Class 491 unit is one of two 4TC sets that were purchased from British Rail by London Underground, for use on their excursions on the Metropolitan line. When London underground decided to dispose of one of its 4TC sets, it was purchased privately with the intent of basing it at Swanage.

During 2016, another DTSO (76275) was offered for sale. This was in much better condition than the other two DTSOs, requiring little more than a new coat of paint. This was mainly because 76275 survived in service as part of a 4VEP unit until 2004. It was decided to acquire this vehicle and use the third DTSO that is in the worst condition, as a strategic spare. DTSO 76275 was restored by its previous owners at St Leonards depot, and delivered to Swanage in May 2017.

All five vehicles (listed below) are now owned by the Swanage Railway trust and are cared for by the Swanage Railway trust 4TC group. Restoration is well underway on TBSK 70824.

Vehicle Number Type Original Unit Number Later Unit Number
76298 DTSO 415 8015 See Photo
70855 TFK 412 8012 See Photo
70824 TBSK 413 8013 See Photo
76322 DTSO 427 8027 See Photo
76275 DTSO 404  8004 See Photo

As can be seen, all the vehicles of our set originated in different units. It has been decided that our set will be designated number 413 for the future.

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