This class of loco often worked the branch passenger service at the time, were there through services to Liverpool Street?

Peter Kerslake says "Walton on the Naze was the end of the line from Colchester and the northern branch off the line to Clacton on Sea to the south, both popular holiday resorts on the Essex coast.
61523 had been one of the early "B12's" inherited by the L.N.E.R. from the Great Eastern Railway, having been built in or about 1910 when the need for a more powerful design than the "Claud Hamiltons" was apparent with a total of seventy coming into service by 1921 and all passing into L.N.E.R. ownership in 1923.
61523 displays her elegant and clean lines in this view with her beaded splashers, her '9x5' builder's plate is visible above the intermediate driving wheel and she has the large style of numbers on her cabsides."