[mdjlucan]

Is this a blackcurrant bush

[Spana]

No, looks like a bramble. Is it in flower now?

[mdjlucan]

Yes it did fruit last year like blackcurrant

[sunshineband]

It does look like a blackberry. Mine are beginning to flower now too, which is very early, but they will be fine

[maloneranger]

Yes it did fruit last year like blackcurrant

But was the fruit a blackberry, or a blackcurrant?

[It sure looks like a blackberry / bramble and not at all like a blackcurrant]

[Gardener and Rabbit]

It looks like a blackberry/bramble of some kind.   

Try taking a look at Rubus Caesius (the European dewberry).  They grow wild on the sand dunes around here, and are lower and smaller than a blackberry.   The fruits have a lot fewer segments to them than a blackberry, often just 3 or 4,  but each segment is much larger and more purple. When the other segments have been eaten by birds or mice, the last remaining segment could look like a single blackcurrant.

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRG6GrAvRtMnI5sKkxoEWM9kfjk7zteJK2jnhOz0HBEVPqID9mQGA

[LilacSandy]

Rub the leaves as a black current has a very distinctive black current smell

[solway cropper]

Definitely not blackcurrant leaves or flowers so not blackcurrant. If it's not a bramble my guess would be some sort of hybrid berry as many rubus will cross pollinate.