Right guys, firstly thank you for your responses and apologies I've not had a chance to update any sooner.
The front sensors started working that same evening, the error kept coming up about the ACC deactivated, checked the front radar thing and gave it a clean just in case but all looked well.
When checking the settings on the stereo all was well, but when I switched the ACC on and tried to use it for some reason the distance to check for obstructions was on the nearest possible which I presume would be right in front of the bumper. Not sure if this is what would cause it to deactivate or not. But since I put the distance to the furthest away with the ACC on it seems to be working and the error no longer comes up.
I briefly got a chance to try the limiter which worked, I haven't tried the ACC as yet as not has a chance to take it on an open stretch to see if it will work correctly with slowing down, accelerating and locating a car as an obstruction.
Will keep you posted, but as it stands it seems as though everything is working but will check thoroughly on the weekend.
Thanks again for you responses, appreciate it.