Noticed this today - is it a case of 'they all do that sir'?

I have just checked mine, it’s bone dry and dusty …. definitely not damp.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Unfortunately water ingress somewhere

Must be water ingress, back on working on mine, been sitting on axle stands for 4 weeks, saw this and thought I had better check my spare - bone dry.

Check for water ingress. Lots of sources ...top tailgate hinges, tow bar bolts into x member, seals etc. It can take a long time to find. Be methodical.
Check behind the side covers to make sure no condensation on the electronics.
Lift spare wheel - any water sloshing about?
I use small pillows of water absorbing crystals to keep any small condensation at bay. Have 4 of them dotted around sides and wheel well. Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
New Defender D300 90 on order.
1974 Series 3 Lightweight = "Millie"
My preferred specialist: www.glenrands.co.uk
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No sign of water in the spare wheel well. Could the compressor be purging moist air creating a tropical micro-climate under the boot floor? 2011MY 4.4TDV8 Autobiography Baltic Blue
TVR Griffith
Alfa Romeo Mito QV

Unlikely to be down to the compressor, it doesn't usually work for long unless you have a leak.
If you have no sign of water collecting in the boot area the condensation could just be down to the weather conditions.
It's likely the wheel has got cold to a temperature below the dew point temperature of the air which given the amount of rain lately could be quite high.
If it's possible take the wheel out, dry it off and sit it somewhere to warm up.
The chances are that would resolve the problem.
If the condensation reoccurs you almost certainly have water sitting in the boot area somewhere.

DrRob wrote:

I use small pillows of water absorbing crystals to keep any small condensation at bay. Have 4 of them dotted around sides and wheel well.

I went for the cheapskate option!

Click image to enlarge

 2011MY 4.4TDV8 Autobiography Baltic Blue
TVR Griffith
Alfa Romeo Mito QV