I'm sure Prior would love to know he got it but there's no need to reply if you're not feelin' it. It's sort of a friendship gift since John told him Ianto had some issues with him & he'd really rather they knew each other better.

As for the above we could wait and see with the event or engineer something before it - though prior is mostly just feeling woeful rn so it may not be the most exciting time to do it.