Are there delays to postage at the moment and issues with tracking?

Are there any delays to postage at the moment and issues with tracking?

As title. The RM website says the service is fine but I sent out 3 Tracked 24 and 2 Tracked 48 small letter sized parcels on Tuesday and so far only one has been delivered by Friday (72hrs/3days)

The tracking seems to say that things are getting held up at an MC? Is anyone else seeing the same or am I just lucky with my location?

I know that the 24/48 is just an aim and not a guarantee, but one 48 has been delivered and usually they arrive within RMs given time range and now I have an eBay inbox with messages asking me where their items are.