The K-type, together with the larger S-type and more advanced NS-type, remained the standard London bus until 1930, when the introduction of the LT and ST types began.
From 1918 to 1930, the K-type, alongside the larger S-type and more sophisticated NS-type, served as the standard London bus. However, in 1930, the arrival of the LT and ST models marked a shift in the city's bus fleet.