You can of course ask the Post Office to deliver to any alternative address - so if your local shop has a sub post office and they are open till 11 pm you can request 'non-delivered to go there, then you pick them up later.
Yes the Royal Mail do have issues - not the least of which is that they HAVE to comply with the universal service condition - they are not allowed to charge you more to deliver to Scourie or the Scilly Isles, DHL can and will and will most probably refuse to deliver in the first place. Royal Mail carry more post every day than all the other businesses in the UK put together, they have the creaking legacy systems that have grown over the last hundred plus yeas and a requirement from the tax payer to build better service with o investment. Because of the universality of service requirements only applying to Royal Mail, the other carriers can cherry pick easy deliveries and routes - note how many of the big couriers will nly deal with businesses, not with the public, dealing with us lot costs too much.
The Royal Mail have many problems, they do have a problem with losing stuff - although they loose less than 0.1% of the post (I think) it is still loads of stuff because of the amount they carry. I have never had big problems with deliveries to here - mind some stuff has been lost. However DHL will not deliver - they consider it impossible to get up our drive, and so just keep the packages in Swansea until I call to find out where they have gone - unlike the Post Office / Royal MAil they are not evn arsed to let me know they have it. Percentage wise I have had far mor things miss delivered, lost or undelivered by the big courier companies than the Royal Mail, and until you get on to big parcels, they are also a darn sight cheaper, unless you can get stuff sent through work.
There are a number of changes being made to the way the Royal MAil operate, and if you look into it it is not 'tehm' wanting to degrade service, it is the Postal act of 200 or was it 2002 that requires the Royal MAil to show a year on year cost base saving, to lean them down for partial privitisation and the opening up of the market to competition - which will be a good thing if you are a business or live in a large town, if not - well enjoy what you have whilst you have it.
R