Well the morning it happened, I checked all the levels on my car, as I needed to check the antifreeze was ok. I noticed that the coolant was well below the min, (which I haven't noticed before) but until now, I was unaware that this was a sign of other possible issues, I just thought it would be a case of topping it up later. Later in the afternoon I took it to a well known and reputable garage as it was having a stage 1 remap. (I didn't say anything about the coolant level, as I didn't think it was an issue and I totally forgot about it anyway). So it was mapped and they took it out to check everything was working as it should, it was going really well, but then it lost power with smoke everywhere and they bought it back, where they told me what had happened. I didn't see the car when or after, so I can only say what I was told. They pressurised the coolant bowl, and the pressure dropped.
I know that some of you are now thinking, WHAT, because I either didn't say anything about the coolant first off, or I didn't go out with my own car, and saying it now, it seems really stupid, but I took it, to improve its performance, they do there job, and it was cold, so I waited in the offices until the job was done, all of this happened without me knowing, as im guessing they wanted to do as much as they could before telling me the news that my pride and joy was not working as it should.
I know it could be a lot of different things, the turbo though is one I hadn't thought of. I just want to gather as much information, so im prepared and know what to get / look for when they investigate further.
Thanks for responding.