Gosh, I've not managed to get back on here till now. Thank you so much for your time and help. We were re-united with our bunny 2 months after loosing it in Kingston - we weren't sure whether we had lost it locally or near my son's school - turned out it was the latter. A lovely dad had picked it up, taken it home and washed it and when I started posting on twitter in January, he spotted us a few weeks later and we were reunited. Best feeling ever! No more feelings of guilt and regret nor tears!
All the best,