a job method statement is just as it says, write down the method you are going to clean the windows with, eg, with a water fed pole, or mop & applicator, its just to stop you dusting the windows with a dry cloth, its put in writing how the job will be done, as for the risk assesment, look at the job, and assess any risks you see, eg pupils, bushes, power cables, the list goes on, and then now you have to number the risk, if you look on HSE website, there are a few businesses on there & templates
idealrob