Solved Jaggy plant

Help! Can anybody identify this plant that has appeared in my garden? It is quite small, about 30 - 35 cm tall, but extremely thorny.

 

?Blackberry

 

But doesn't a blackberry usually have long, single shoots? I might be wrong...
This is more a small, bushy plant.

 

Not something I have come across.

 

I have a patio blackberry in a pot which is a small bushy plant at the moment. It may develop longer canes later but as it was new last year I'm not sure. However, I think it's almost thornless.

 

It's a young Rubus but would hesitate to say definitely BlackBerry. Chris Bower's site may help with definite ID.
Specialist Nursery Fruit Trees for Sale UK, Bushes Plants, Soft Fruit

 

Spotted this today a wild blackberry that had been cut to the ground. ⁹