They’re a bit lacking in the brain department here. That usual Royal Mail bone-headed behaviour of trying to deliver a parcel eg. ringing the doorbell once for a split second and immediately shoving that«oooh you were out» card through. So you make the effort to go pick up your stupid delivery in that tiny time window they give only for them to say that the postie hasn’t returned from his round yet. But I’m pretty sure this is the same for every sorting office in the UK ever.