Absolute nightmare - but I got them done in 2hrs on my driveway
It's easy getting the brackets off and pulling the old bushes off - and it's easy putting the new bushes on but then trying to get the bracket back over them is near impossible
What I ended up doing was getting a 50mm long m8 bolt and nut with a couple of washers and putting them through the bracket
Then used them to pull the bracket shut - when it was shut I clamped it with a g-clamp so it couldn't move and removed the m8 nut/bolt
Then put the full size proper bolt through and tightened it up
Wasted about an hour trying to do it first before I did that - it works a treat