It would take around the same time to fit lowering springs than coilovers.Smyth said:I used Pro-Grip in Larbert who were £168 to fit my coilovers and get the alignment doe.
The alignment itself was £46 and according to my invoice 2.9 hours of labour at £42 per hour were needed to fit them.
Granted this was for coilovers so lowering springs might be a bit cheaper.
I would highly recommend Pro-Grip if you're willing to make the trip through, the guy knows his stuff and did a top job.