Highlighting the fact that Prime Minister David Cameron and Chancellor George Osborne are Old Etonians, transport union TSSA's protest at King's Cross featured a top hat-wearing "ToffsRUs" band.
Waiting for trains at King's Cross station in London today, passengers expressed their anger at the rise.
Outside the station, shadow transport secretary Maria Eagle joined the protest against the high fares.
Some commuters appeared to agree with the protests.
Leeds-bound hairdresser Gavin Lambert, 45, described his service as "rarely on time and often overcrowded", while his friend Kevin Gowland, 46, a musician, said people were taking to the roads as the rail service was "so bad".
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The company said it had "considered pricing changes very carefully" and "sought to minimise the impact on customers".