1. request a delivery at work, let the receptionists at your office sign for the package and very politely thank them each time (and don't do this too often)
2. place the order to be delivered at your home address, knowing that you won't be there and that you'll have to pick up the "you were out..." slip, and duck out of work and cross town later in the week to the post-office sometime during opening hours and suffer the queues there.
The reason I use the word "awkward" is that I feel like I'm misusing some facilities no matter what I do (expecting a receptionist to handle my packages, or making a postman bring a package all the way to my flat and then all the way back home and fill out forms etc).
These temp lockers are such a great idea.