Re: Ferodo DS2500 part no's??
I went to Halfords part desk and asked them about 155 pads, told them year and model, I looked in thier FERODO parts catalogue at the pics of the pad outline and got them to get a set off the shelf, to have a look at pad backing plate shape and pad shape, from this I found the pad type I needed then I went and ordered them from SCA. (The FERODO pads have the same application code for each pad compound type) so the 565 bit of the FCP 565 2500 code refers to the application.
Thats how I worked it out, but it probably would be best to ask a specialist if you are not sure, then order from the cheepest source knowing the correct code.