A ladder comprising: first and second rails (2, 4) spaced apart and with rungs in between, the rails (2, 4) defining first and second ladder sides; and a telescopic stabilizer bar disposed at the foot of the ladder, the telescopic stabilizer bar comprising elongate first and second stabilizer portions (10, 12), each stabilizer portion (10, 12) in sliding engagement with a connector bar extending transversely between the first and second rails (2, 4), wherein the first and second stabilizer portions (10, 12) are slideable along the connector bar from: a first, stowed, position where the first and second stabilizer portions (10, 12) are in an at least partially overlapping relationship, with the connector bar in between; to a second, in use, position where at least one of the stabilizer portions (10, 12) is slid along the connector bar to extend the telescopic stabilizer; wherein sliding engagement of at least one stabilizer portion (10, 12) to the connector bar is by means of; at least one longitudinally extending flange or other formation on at least one stabilizer portion (10, 12) fitting into a corresponding longitudinally extending groove in the connector bar; or at least one longitudinally extending flange or other formation on the connector bar fitting into a corresponding longitudinally extending groove on at least one stabilizer portion (10, 12); and characterized in that the first and second stabilizer portions (10, 12) each take the form of an elongate bar having a generally C shaped cross section along its length. first and second rails (2, 4) spaced apart and with rungs in between, the rails (2, 4) defining first and second ladder sides; and a telescopic stabilizer bar disposed at the foot of the ladder, the telescopic stabilizer bar comprising elongate first and second stabilizer portions (10, 12), each stabilizer portion (10, 12) in sliding engagement with a connector bar extending transversely between the first and second rails (2, 4), wherein the first and second stabilizer portions (10, 12) are slideable along the connector bar from: a first, stowed, position where the first and second stabilizer portions (10, 12) are in an at least partially overlapping relationship, with the connector bar in between; to a second, in use, position where at least one of the stabilizer portions (10, 12) is slid along the connector bar to extend the telescopic stabilizer; wherein sliding engagement of at least one stabilizer portion (10, 12) to the connector bar is by means of; at least one longitudinally extending flange or other formation on at least one stabilizer portion (10, 12) fitting into a corresponding longitudinally extending groove in the connector bar; or at least one longitudinally extending flange or other formation on the connector bar fitting into a corresponding longitudinally extending groove on at least one stabilizer portion (10, 12); and characterized in that the first and second stabilizer portions (10, 12) each take the form of an elongate bar having a generally C shaped cross section along its length. a first, stowed, position where the first and second stabilizer portions (10, 12) are in an at least partially overlapping relationship, with the connector bar in between; to a second, in use, position where at least one of the stabilizer portions (10, 12) is slid along the connector bar to extend the telescopic stabilizer; wherein sliding engagement of at least one stabilizer portion (10, 12) to the connector bar is by means of; at least one longitudinally extending flange or other formation on at least one stabilizer portion (10, 12) fitting into a corresponding longitudinally extending groove in the connector bar; or at least one longitudinally extending flange or other formation on the connector bar fitting into a corresponding longitudinally extending groove on at least one stabilizer portion (10, 12); and characterized in that the first and second stabilizer portions (10, 12) each take the form of an elongate bar having a generally C shaped cross section along its length.