This subject isn't my cup of tea but I bought the negative because the location is on the Weymouth Harbour Tramway.
The unit is Railtrack Sandite/De-icing 3-car unit no. 930301 which was a conversion from a 205 class DMU. Does anyone know when this unit ran the length of the tramway in the second half of the 1990's?
And the answer, a more interesting one that I could have hoped for, has been sent to me by Dennis Harlow to whom go my grateful thanks: "I was an operations manager on board this service which was in March 1999. The rear power car suffered a fractured cooling fan shaft and so the unit was left at Weymouth and was, I believe, towed back to Selhurst some time later".
[Mike Morant collection]