First one is on the top of the radiator, right hand side as you're looking at it. Second one need you to remove the front bay plastic cover, that sits just behind the brake servo. You'll see a bleed nipple coming out of more or less the middle of the bulkhead.
The third one is hardest to get at but not impossible. Lift the inspection cover and it's on the metal pipe on the nearside of the engine. On mine at least it's just an M5 bolt, so an 8mm spanner or socket. I found a 1/4" drive ratchet & a long extension made it easy to access.
HTH