thanks for all the tips,

ended up using a combination of heat and a chisel for the ones that refused to come loose.
Wheels are all stripped down now and ready to be re spoked and fresh bearings while i'm at it.

i did have one bolt snap though, one of the pinch bolts that holds the front wheel axel...... it rounded out so i used a screw extractor tool. this worked but it just snapped the bolt leaving a section still in there.

I'll have to drill and try the screw extractor again, or end up drilling the whole lot and then re tap the hole.

either way every bolt (including all the disk bolts) is being replaced with new