I have just bought a Mini Cooper 2004 1.6 petrol, it's started to overheat and dumped all of its coolant. After bleeding the cooling system it seemed okay although after taking it for another drive I came home parked up and it's dumped something else all over my drive, not oil or coolant as these were both okay. Now coming out this morning and running it for 10 minutes the temp gauge got to 90degress while sitting idly (I have the chrono package so normal running temp) but then all of sudden I see smoke coming out of the bonnet again, so I switch it all off and have left it. Any advice?

 

You need to get under the hood and under your MINI to see where the fluid is leaking from. It's not uncommon for the coolant expansion tanks to leak and spew coolant everywhere. Until you know where it's coming from it's going to be hard to diagnose your issue. You have a coolant leak somewhere that you need to fix.

Here is info about the expansion tank: MINI Cooper Coolant Expansion Tank Replacement (R50/R52/R53 2001-2006) | Pelican Parts DIY Maintenance Article.

Let me know what you find out when you take a look under the bonnet. You'll most likely want to take a look at it when the issue is present.