Firstly sorry for the late reply, been quite busy.
Secondly thanks for all the help, I finally managed to get CM installed with a combination of the suggested recovery, a different USB cable (I think this was the killer) and several attempts in fastboot etc.
My current problem is as shown:
So battery life is pretty poor (even though i had the battery replaced with a new one!) So far I have set my location to battery saving, and manually chosen my mobile network which has improved it somewhat, but I am struggling to make one day with very little use. I know the battery is working well because I was n the phone for a while and it did not drop much.
There are no kernel or partial wakelocks that I can see, but as the screenshot shows there is quite a big discrepancy between Awake and screen on.
The only thing I can find (and please excuse my lack of understanding and ability with better battery stats) is that under Alarms, com.google.android.gms shoes as "54%"... so not sure on that one... halp?