I removed and adjusted both seats yesterday and found it a relatively straightforward exercise as described by Neil earlier in thread. Both my seats were on the lower settings front and rear, hence the upright driving position!
My only addition to Neil's advice is to consider taking out the small grub screw holding the adjustment lever in place first of all. I found my drivers side screw badly rounded and almost could'nt get it out - would have been irritating to find that out having already removed the seat! Need to order a replacement screw...
The seats are even better now and the steering wheel falls more comfortably in my grasp too. Off for a drive now!