At the beginning of lockdown, my mother-in-law's grandson sent her a plant, which was being delivered by RM. They attempted to deliver the parcel whilst she was out, but they wouldn't deliver the parcel to a neighbour or leave the parcel in a safe place. They just left a note saying 'perishable, collect from sorting office' or similar. We live ~12 miles away and we went to deliver groceries (she is 90, rather frail and isolating) and found this situation. So we headed off to the sorting office, which is two or three miles away. Not only was it closed but we found that the parcel wouldn't been available until the next day. Not only that, but the office was only going to be open for an hour from 7.00am to 8.00 am. If we were to collect the next day we would have had to get up at ~6.00 am to get to the office for those opening times. If my mother-in-law was to get it it was 2 buses, and during that time I don't know whether it would actually be possible to get there by that time bearing in mind the restricted service.
There has been a lot of comment above about parcels delivery companies and their ability to allow you to track your parcel. This is like so many things nowadays. Everyone expects everyone else to be computer savvy and to have the equipment and knowledge to be able to track. Unfortunately a minority of people cannot or will not go on-line. The parcel was a gift which was not expected, so no tracking number was available. Nearly all other delivery services will deliver to neighbours or leave the parcel safe, not RM though.
Perhaps there are other things RM could do better.