CB1
I was invited back about a year after my Stage 3 interview. Unfortunately by that time I had started the ATPL groundschool so they said I had gone beyond being considered as an "ab-inito" candidate
I had just assumed that because I didn't get any indication after my interview that I had been considered a "near miss" and hence had the chance of a second bite at the cherry, I would have to proceed down the self sponsored route, which I did.
Best thing is to give them a call and see if you fall into that category. I would have loved for another chance at that, but instead will just have to have a go at the CTC scheme for fATPL's (if it still exists when I qualify!)
Regards
PW