If you want it to pop out, just drive around a bit longer and it will do it all by itself
Depends on whether you've had the mod to reinforce the clips as to how hard they are to remove. Its not that tough though, think you have to do it by pulling back the wheel arch liner though...
It must be easy. My indicator popped out all on its own. At 70mph on the motorway! Took the helpful chaps at Westover no more than 10 mins to change it for a new one with the decent clips.