Royal Bank of Scotland GBP 10 Specimen Banknotes A/1 Prefix set

One of my proudest collection. The complete set of RBS GBP10 specimen. My wallet was emptied just to have these two pieces in my collection.

I was studying in Leicester, United Kingdom when I come across these set of notes.

To have been able to get both the printer specimen, and normal specimen is already not easy, furthermore both of same prefix, and A/1 prefix somemore...