That gawky growth habit makes me think of Kerria japonica, maybe Jasminum nudiflorum, though the leaves don't look right for the latter. Hard to be sure at this stage, with the leaves only just arriving.

Thanks Bamboo. Should it be cut back? If not now, or later.

No, best wait till its obvious what it is, for all we know it might flower before June, and pruning it now will mean it won't...

Ta.

I think it is Leycestria Formosa (Pheasant berry). You can cut it down any time as much as you want. It has attractive flowers followed by black berries which the birds love.

Thanks SG. Will let it kick on & time will tell.