Sorry I've just got back to this due to work.

Yes I read it using a SO8 clip in the hope that I wouldn't need to desolder it off the board. I've read that sometimes these can give false reads though...is it entirely necessary to desolder?

I will try again tonight...all I am doing to connecting the clip onto the chip, noting Pin 1 position, selecting the chip type and saving the contents to a BIN file...is this definitely all I need to do?

I suppose there is no way to know its worked until I run through the decoder?