Cheers guys. The old pump was extremely loud (louder than the engine!) So not sure how far gone it is. The replacement is a used item anyway, so if its no different it wouldn't have really cost me anything!
Not put the replacement pump on yet, need to get some new fluid as i think the current fluid is a mix of 2 different types :-/ going to have to wait for payday unfortunately!
Its only parking that's a slight issue due to the hard steering but apart from that, driving the car is actually fairly enjoyable! If the replacement pump is also bad, or the rack is damaged, I may replace it with a non pas rack anyway...quite liking the heavier steering, feels more like 'I'm at one with the car', if you know what I mean!