Fairly tongue in cheek, but having successfully applied for a Diamond Wedding congratulatory message from the Queen, I was a bit non-plussed to then receive this message:
*confirming your application for a congratulatory message from The Queen, please note that there will be a delay to the delivery of Her Majesty's card. The message will be delivered as soon as possible, but we are unable to specify a date at this time.
Thank you for your patience and understanding.
The Anniversaries Office*
Since these messages only go to people who have been married 60 years, or made it to their 100th birthday, I would have thought time was of the essence in these cases.
Maybe the palace could take on a few extra temporary staff to clear the backlog and catch up, or temporarily redeploy staff who would usually be organising royal visits or walkabouts that are not currently taking place?