Thanks Alun and Steve for your answers, why I asked the question is because I brought a set of adjustable ride and height gaz shocks and standard springs from the big shop in Lincon at the end of the summer and fitted the front ones to my sprint ( have not got around to fitting rear ones as of yet), After about a month and 200miles and a few adjustments to the height on the springs I was nearly right up to the top of the adjustment on the shocks with a ride height of about 320mm from wheel arch to wheel centre,I removed them from the car and the free length of the springs to start with was 360mm (14") but after a month one was 13" height and the other was 12.5" height.To cut a long story short I contacted the shop and spoke to a chap in customer service who was helpfull and said he had not heard of this before? and said I could send them back to which I agreed and said I would exchange them for standard height heavy duty ones , But off course they sent lowered 1" uprated ones, to which I contact him again and he sent the right ones next day, as you can see in the picture.The part number and specs are below.
The one that is on the right in the pic is:-
TKC768UR Lowered 1" uprated 175lb free length 315mm (12.5")
The one on the left in the pic is:-
TKC768HD Heavy duty Standard height 170lb free length 330mm (13")
TKC768 Standard height 139lb free length 360mm (14")
Hopefully I will fit the new springs next week and see how I get on I will let you Know.