Help Cooling Problem

[sambradley23]

Ok guys was heading back from a night out and I looked down on the dash to see my car temperature had increased from 90oC (what it normally sits at) to 110oC I was driving about 60mph so I dropped down to about 50mph which seemed to make it level out but got progressively worse as the journey went along needed to go 30mph in the end. Assumed it was lack of coolant so got out bottle was empty so unscrewed cap and it bottle started to fill it was then between maximum minimum levels but the problem persisted when I opened it a second time with the engine running the coolant was coming up so far it was coming out of the bottle. Any ideas what's wrong. PS the heater/fan (dual climate) only ran cold even at the highest tempayure setting. Any advice guys would be greatly appreciated.