35027 Port Line was one of a batch of ten SR Merchant Navy class steam locomotives built by the Southern Region of British Railways between 1948 and 1949.

Last working from Weymouth in 1966, it was withdrawn at the end of steam on the Southern Region in 1967 and sent to Woodham Brothers scrapyard in Barry, South Wales.

Port Line stayed in the scrapyard until May 1982,[1] when it was saved; this was part of a BBC documentary The Train Now Departing.

35027 moved to the Swanage Railway in early 2000, further boiler work allowing it to operate a limited number of steamings from November 2000 until October 2003, when it was stopped with firebox cracks.

In January 2011, transferred to the Royal Scot Locomotive and General Trust (RSL>), Port Line was moved to Ian Riley's workshops at Bury on the East Lancashire Railway for overhaul to mainline standard, using the boiler from 35022 Holland America Line.