Many thanks for your excellent reply and pictures, so much more information than I thought I would discover.
I've spent the afternoon looking up Lorne and trying to find out more about him. He does appear on many BC Rich forums and Facebook but I never came across any references to the bands he played in, if any. He was able to access a workshop and made the bass lying flat, at the front, with the zig-zag pattern down the fretboard. I think he made the orange bass, with holes, also.
When I bought the Ironbird I was only in the house for 10 minutes or so but it was mentioned that Lorne had died and that the last guitar they sold took ages to sell so they were surprised that this one had sold in 40 minutes. What happened to the others? Lorne seemed to buy and sell quite a bit. Most of his postings were around 2007, I think, so perhaps they were all sold off over the passing years. Perhaps he hung on to his favourites.
I knew the Ironbird was worth a bit but not that much! Very surprised!! When I got it home, I noticed that the A and D string rattled on the frets. My first thoughts were that the truss rod needs looking at. The whammy bar is also missing but hey! I found a good luthier in Cornwall and was going to take the guitar over but when I rang, he told me he had now retired. (Despite having a full-on website still up and running!) I'll look for someone else. 🙂