When Effie and Ruskin go to the academy dinner (where Effie sees Millais for the first time), several paintings on display were not actually painted until some years later, notably Holman Hunt's 'Valentine Rescuing Sylvia' that Ruskin discusses in his speech about art, Millais' 'Ophelia' and also his 'The Order of Release'. (This could be considered foreshadowing, as Effie was the model for this painting in 1853)
Effie Gray was married in 1848. In exterior shot, the train she then travels on is hauled by a locomotive of a design dating from 1934, consists of coaches dating from 1951 and is crossing a concrete viaduct the first of which was completed in 1898.
The movie poster shows Fanning as Effie superimposed over Millais's painting "Ophelia," implying that Effie was the model. She wasn't; Elizabeth (Lizzie) Siddal was the model for Ophelia. (Lizzie was Gabriel Rossetti's wife and their story is as scandalous as the Ruskins'.)