Undo the x2 10mm bolts to the fuel filter housing bracket and remove the housing.
Using a 15mm spanner on the auxiliary belt tensioner (pic 1) apply pressure clockwise to remove tension so that the auxiliary belt can be removed. Using a metal pin or nail you can lock the tensioner (pic 2) to gain access to the cam belt metal side cover otherwise unbolt the tensioner.
Undo the x4 T45 bolts to the bottom pulley.
Undo the 8mm bolt to the auxiliary belt idler….
The water pump is secured by x3 6mm allen bolts, you’ll need to lay down a catch tray for the coolant.
Apply a thin layer of silicone around the surface of the new water pump, lay on the gasket and bend over the securing tabs then ensuring the water pumps housing face is clean replace the water pump.
Now you can replace the new cam belt kit. Tack the tensioner in place and do up the idler.

