Wild raspberries

[davee52uk]

At the back of my allotment there seem to be some wild raspberries growing. They may also be logan berries which I used to grow nearby. Whatever they are, they are growing a blackberry scrub area between plots.

Qu 1.

How do I tell if they are raspberries or loganberries - there's no fruit at the moment.

Qu .2

Would it be worth encouraging growth or cutting them back and encouraging the blackberries

[davee52uk]