Red Spots on Raspberry Leaves
The one thing that springs to mind when you say red spots on Raspberry leaves is Anthracnose, its a fungal pathogen. It also attacks other parts of the plant later in the year when summer spores erupt.
You may find then that yours acquire the problem, but being grown so close to your neighbours and not showing any signs of attack yet it may well be that you have a resistant variety of which there are ones available.
Many thanks for your query, and hope this helps.
Pest Control Expert