These were the first buses delivered with pneumatic tyres.
| Model | Maudslay ML4A | |||
| Details |
Single deck with Hickman bodywork and dual entrance suitable for either one man or crew working Maudslay 4-cylinder ohc 4.06 litre petrol engine 26 seats |
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| Number | Delivered | Withdrawn | Reg No | Notes |
| 20 | 1927 | 1938 | WK500 | |
| 21 | 1927 | 1938 | WK501 | |
| 22 | 1927 | 1938 | WK502 | |
| 23 | 1927 | 1938 | WK3101 | |
| 24 | 1927 | 1935 | WK3102 | |
| 25 | 1927 | 1938 | WK3103 | |
| 26 | 1928 | 1938 | WK6601 | |
| 27 | 1928 | 1935 | WK6602 | |
| 28 | 1928 | 1938 | WK6603 | |
| 29 | 1928 | 1938 | WK6604 | |
| 30 | 1928 | 1935 | WK6605 | |
| 31 | 1928 | 1935 | WK7501 | |
| 32 | 1928 | 1935 | WK7502 | |
| 33 | 1928 | 1938 | WK7503 | |