Thank you very much Coding Badly - I really appreciate your help.
So to be clear, I should change Prescale_Value_1 in your code below to 255 (255+1 = 256)?
How does the timer change affect the pin mapping? I was (arbitrarily) going to use physical Pin5 (or Pin0) for my PWM source, would this still be the pin to use? The datasheet shows all the PWM pins having a OC0A or 0C0B reference making it not clear to my inexperienced eyes as to which PWM timers are mapped to which pins?