Soaked the bolts in oil this morning and have invested in an angle grinder and cutting discs...im fearing the worst... 
If you can get an angle grinder onto it....mine was to big so bought a dremel with a flexible attachment...takes a while to cut through but worded pretty well.
If you have any probs just give me a shout, am still working on mine and have the laptop out with me all day.
I have to say I got pretty annoyed with mine too lol...after I cut the bottom one off I went to the scrapy and took the whole air con system out of the golf there as mine was cracked for some reason...
Turns out that I actually have enough bolts now to refit everything without going to VW, the studs I ordered from them still havent arrived.
Got my delivery from GSF yest so have a nice new thermostat and expansion tank to go in and resprayed the tank and fan holder.....yesterday was a productive day
