The key SCRCA-related structures visible in this stunning photograph are (from left to right): the worker's cottages at Grisedale, Lunds Viaduct (Bridge SAC/121), Bridge SAC/120, and the north portal of Moorcock Tunnel (Bridge No 119). The train is a special northbound passenger service hauled by class A3 No. 4472 'Flying Scotsman', circa May 1980.
This image was kindly supplied by the RCTS Image Archive (RCTS reference LAN0388C) - see:
https://rcts.org.uk/features/archive/