Hydraulic lash adjuster replacement

Would anyone be able to explain how to remove a lash adjuster from it’s place in the head. I have one that’s failed and is not allowing the cam to make contact with the finger roller, I don’t want to remove the cylinder head and think it’s possible to do the swap in situ, albeit a bit tight?

Standard TD5 10p head.

magnet whilst levering slightly with a screwdriver if needed

Thanks James, so, in order to get that done, What is the least amount of components I need to take off the head to manoeuvre the finger follower away from the valve stem and gain enough clearance to manipulate the lash adjuster off.