Hi Laurence - hope you're well?
you can buy a split-ring from any fishing shop which will allow you to attach the original zip-pull and save any problems of removal from the actual zip mechanism. Should cost about 25p.
best
P
You've just said it is 'minty' and you now want to try giving it a 'Ding'. Young people today, just don't know the value of things. When I were little, I got an orange in a sock for Christmas and thought I were luckiest lad in't world.