You're right, there is a service kit available and I'd love to sort it myself, but just simply haven't got the time at the moment. This means I have to pay someone else to do something that I am perfectly capable of doing, which I hate but needs must and all that. Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

I was thinking along the lines of your garage fitting the service kit in preference to a brand new compressor, but you will obviously have to see what their diagnosis is.

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Ah, I see. Me being a bit on the thick side there!  Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

Having had a quick look underneath I see that the air cylinder is in a bad way (badly corroded), maybe that's leaking. Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

Well, it's fixed. And it was the driver side air bag, massive split. Really weird because it was the first thing I looked at and I couldn't hear any hisses or anything even on full extension. Still, that's what it was. Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII