Between 1924 and 1934, route numbers 4A and 4B were used for short workings of the full route.

Services developed such that by 1926 there were three full-length cross-city tram routes with seven short workings.

More peak-hour cars were put on between the Market Place and Hyson Green, together with other short workings.

It is a short working of the standard route 15.

After hopes that this would be operated commercially, it eventually materialised as tendered short workings on two existing routes, one of which is the 9.

Later, these short workings were numbered 5A.

The short workings were mainly from the London end, hence their allocation to Brixton Hill.

Some services are short workings and are designated with a letter "E".

Some routes included short workings, which were typically extra services run to intermediary termini to cope with high loadings at peak times.

In November 2005 it was announced that route 15 had been selected as one of two heritage routes to include short workings operated using Routemasters.