Thank yu for contacting me.Like you I have only just started and haven't done any major research.I have a list of all John and Charlotte's children and all decendants of Plantagenet.Do you have this information.If not let me know and I can send it to you.
I have been in touch with Sandy and Pauline Pendlebury and Richard Pendlebury who have a lot more information than me and have offered to send it to me.Also my cousin Jocelyn Hanby has information that I must get off her.
Unfortunately no-one seems to be able to get any earlier information on John and Charlotte except their address in Manchester which you have and their wedding date at Manchester Cathederal.
Let me know if you need any of the info I have or you gain any extraespecially about their wedding.
Look forward to hearing from you in the future.The above people mentioned can all be contacted through the message board and they are really helpful.