Sent a first class letter within the UK as a signed-for letter. I would expect that a first class letter be delivered within a maximum of 3 days. However, this letter took 3 weeks and one day to arrive at the destination. Another letter first class letter that I posted at the same time, reached its destination after 2 days. The only difference was the signed-for option. The UK royal mail signed-for system is a total joke. The service is not fit for purpose, both for international and domestic signed for mail. I made a complaint about the service by phone, email and finally by letter (yes the irony). The best that Royal Mail could say was that they had no idea what had happened, and that I should make a formal compensation claim to get my money back.