This plant is a weed of National Significance. Gorse is an invasive spiny shrub that forms dense impenetrable thickets. It can reduce pasture carrying capacity, block access and provide shelter for pests. In National Parks and other environmental areas, gorse can compete with native vegetation and increase the risk of bushfires—as it contains flammable oils and retains dead vegetation, increasing fuel loads.
https://weeds.dpi.nsw.gov.au/Weeds/Gorse
http://keyserver.lucidcentral.org/weeds/data/media/Html/ulex_europaeus.htm
Ulex europaeus is listed in the following regions:
Canberra & Southern Tablelands | Southern Highlands | South Coast | Hume | Gippsland | Tasmania