Thank you very much for all your help.
I am very happy with the Roller Shutters and with the professional installation of the Oz Shut Roller Shutters to my home.
The north facing bay window has always been problematic as it projects almost to the limit of the eaves and so gets too much sun and if the window is left open, rain gets in easily. The curtains are badly sun damaged and since we use this room as our TV room it is too bright during the day unless the curtains are drawn.
The only solution I could come up with was Roller Shutters and the OzShut Roller Shutters turned out perfectly. The installation went off without a hitch and on schedule.
The colour choice matched the colour of the gutters and the pool fencing as you can see in the attached photograph.
But the greatest effect was on the inside as the heat and light of the summer sun is kept out but the window can be left open as the gaps in the shutter allow the evaporative air conditioning to work to full effect.
I only wish that I had the Roller Shutters installed years earlier.