Thank you Zubin, your instructions and photos are better than a Haines workshop Manual. I was able to replace my daughters Holden Barina TK timing belt (after much consternation as to why any engine designer in their right mind would incorporate the water pump into the valve drive system) with a sense of achievement, specially since I saved many hundreds of $$ as quoted by my local Holden service department.
Your idea about marking the new belt with white-out saved a lot of time and energy when trying to line up the belt for tensioning. I was also able to get away with using adjustable locking plumbing pliers instead of the special tool to rotate the water pump for tensioning.
I was also lucky (keeping my fingers crossed), that the water pump was in good shape and hence my considered decision to leave it alone (without completely removing it from the engine to replace the housing gasket). I would advise to readers to use their own judgment depending on the age of your Engine.