[[Image:UK road A(({1))}.svg|50px|alt=A(({1))}]] [[A(({1))} road (Great Britain)|A(({1))} road]]
Simply type ((ukroadsmall|A-road number (without the "A" prefix))).
i.e.:((ukroadsmall|1)) produces:
A1 road.
For an example of the output, see A61 road.