for anyone thats interested I ended copying the entire DCS folder onto a portable SSD drive, took that to work, launched DCS World, ran the updates, downloaded the latest 9Gb patch, went home, copied the folder back and all sorted.
I had to reauthenticate some of my addons on my work computer but thats not a problem, so from now on I will simply run it on the computer at work using the portable SSD drive and then repeat...
The handy thing is that to copy the 144Gb from SSD to SSD only takes about 15 mins so I'm now more than happy!!
Thanks for the hints all!