Personally, I like to find someone in desperate need, get some additional leverage over them (just in case the thought about doing a runner), and slip it up their.....
...Oh..... different sort of courier
Another thumbs up for Shiply. Arranged transprt of a car for a good price, and many car bits shipped across the UK with zero problems
The company I use have said it's not something they can help with, but that they suggest www.parcelmonkey.com and since others have said it's good, fair to say try them