Thought i'd throw an update in here...
i've only been getting 1 hour sessions in during the week, so i've been doing a quick 'lap' of the weights room for 30 mins and then 30 mins swimming. I've also stopped eating as much junk food.
I've lost 7LB since Thursday 12/4

(was 14.4, now 13.11)
It's quite weird, because i actually feel motivated and energetic at work now too