RIGHT...Bit of an update!!
Just been to collect my car from the garage... started it up and the battery was nearly flat as it wouldn't crank over enough to start so they had to jump start it...
Once the car had power I waited for all the faults to happen... (normally they start after a minute or two) After a few minutes everything seemed to be working! After an hours drive home EVERYTHING was still working! Inside fans, wipers, indicators, door locks, all working and the engine fan wasn't spinning up mega fast too like it did before. Turned the engine off when I got home and turned it back on and everything was still working! Even the display were showing the doors were locked correctly.
Surely this means that my modules are not fried like I first thought??? What is going on! lol I think there still must be some kind of fault though for the battery to have gone flat after just a week as its a brand new Exide battery and quite a good one too? Something is obviously draining it quickly.
Does this narrow down what the fault could be though?