It's not an actual breach, it's in their terms and conditions - they protect themselves from
every angle possible.
I've been having an absolute nightmare with UK Mail too - my silicone cases were supposed to be delivered on the 15th of September. They were delivered yesterday evening. Took me 8 phonecalls/chats with Apple, 3 phonecalls with Syncreon and 3 phone convos with UK Mail itslef to finally get them.
They mess people around, blame each other for poor logistics and it's just like a game of tennis with you, the consumer being the ball.
UK Mail is perhaps the worst courier in the UK - I'm really surprised that apple even lets Syncreon use them. They're unreliable, rude and just *****!! On one occasion my order was delivered to my neighbour because the driver couldn't be arsed to knock on my door 🙂
They will re-attempt delivery tomorrow or the next working day. After that, be prepared for a lot of grief with getting your parcel. I know I did!!