No it's not.
Just for confirmation is only the very first key created the only one that can ever be used? No key ever subsequently created in the aws console will give access?
I used the instructions here https://aws.amazon.com/getting-started/tutorials/launch-a-wordpress-website/ to create my instance it was clear at point 6 that it was created without creating a key pair.
This is now causing me a little confusion, what would have happened if I had proceeded with a key pair at point 6?
Anyway, the snapshot seems to be the way forward, just got to work out what that entails. Hopefully somewhere here there is a guide!
It may be that creating a Ubuntu instance and installing WordPress the long winded, old fashioned way could be a better option than using bitnami, if only to have the ability to have multiple ssh keys to access my cloud storage.
Thanks for your time.