4 Hours, including alignment check and road test.

^ Yeah that seems about right. Front struts can come out and go in as one, no need to faff about with taking springs off.

What if it's just the fitting (as long as it's roughly correct, thinking I would take car to do the alignment checks myself at a place I trust implicitly as I know it's not done with poxy lasers!)?

MK2 Pre Fl. Springs Eibach £110 delivered, Mann service kit, Pollen, Air, Oil, Fuel Filter plus Quantam Longlife £60. Labour for garage to change 4 springs and do service £120, you are being ripped off.