The RRS 2.7 creates loads of white smoke when it has idled for a while in a queue or such like. It clears after a bit when you move off. It doesn't smell of oil and I'm not losing any coolant so I presume it's unburnt fuel. What causes this?

Normally, worn injectors

How many miles has the car done?

Thanks for the quick reply - it's done 106K. I'll try some quality cleaner but is changing the injectors a DIY project? I have Nanocom

Just taken some video of Nanocom showing injector levels.

Typically the injectors are reading as follows
1. 660
2. 605
3. 1348
4. 1396
5. 1393
6. 1181

The balance faults are showing as:
P02AA Cyl 5 fuel trim at max (perm)
P02A7 Cyl 4 fuel trim at min (perm)
P029B Cyl 1 fuel trim at min (int)
P029E Cyl 2 fuel trim at max (int)
P02A2 Cyl 3 fuel trim at max (int)
P02AE Cyl 6 fuel trim at max (int)

I am assuming Injector 4 and 5 are well worn and need replacing? Do I bit the bullet and do 3 & 6 as well?

Gonna answer my owner question I think. I found DiscoMikey's excellent thread about changing injectors over the on the Disco3 site and then onto Steve Norman's stuff about values etc. Looks like the ECU lowers the good injectors to compensate for the high ones. Might change the worst two and see if it helps
http://www.disco3.co.uk/forum/topic126044.html = DiscoMikey thread
http://www.disco3.co.uk/forum/topic100709.html = read Steve's post

For starters, I would be replacing 3,4 and 5

But in all reality, you will most likely end up replacing the other 3...