Hi Nicola.
I decided to just go with barcode but I was in two minds about including ISIL as although it would enable other libraries who came across our books to identify them as ours (providing they had RFID) in a small place like ours I thought it unlikely.
All the best,
Keith
Keith Lang
Librarian
01923 456190
The Library, London School of Theology
Green Lane, Northwood, HA6 2UW, UK