In 1912, the C&SLR submitted another bill for Parliamentary consideration seeking to increase its capacity by enlarging its tunnels to the larger diameter used for the tunnels of the more recently built railways to allow larger, more modern rolling stock to be used. A separate bill was published at the same time by the London Electric Railway (LER, a company formed by the UERL in 1910 through a merger of the BS&WR, GNP&BR and CCE&HR), which included plans to construct tunnels to connect the C&SLR at Euston to the CCE&HR's station at Camden Town. Together, the works proposed in these bills would enable the CCE&HR's trains to run over the C&SLR's route and vice versa, effectively combining the two separate railways.