This won't happen because electoral wards are not part of the agreed administrative structure for the UK:
https://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative

Suburbs are mapped:
https://wiki.openstreetmap.org/wiki/Tag:place%3Dsuburb
but as points at the centre, not as geographic areas.

A  better solution would be to overlay the boundaries of interest on top of the general  map - this is done quite widely, and requires no licensing, only acknowledgement.


