This grower is sure of this plant identification.
Winter jasmine, Jasmine
Jasminum nudiflorum (Winter jasmine). This species is a rambling deciduous arching shrub. The leaves are oval and dark green, the plant will grow to about 3m tall with a similar spread. It will bear masses of bright yellow flowers on slender, leafless green shoots in mid winter and early spring.
J.nudiflorum, which is not self-supporting, benefits from having old shoots thinned out after flowering; prune others as required after flowering.
Wall or trellis, ground cover. Spring/Winter interest.