Again thanks for the reply! Its funny you mention electricians - we have one on site at work who asks me for a lot of advice RE access points and wiring lately. He also recently informed me that he was going to run a 300m length of cat5e as it would obviously be fine or they wouldn't sell it in a 305m roll :/
The office I need to sort out has switches of various brands, wires all over the place and is currently all on 10/100. My intention is to sort the wiring, and change all switches to gigabit. It's looking like an overnight job as the office is occupied 7 days a week.