I could be going mad but I'm sure I read somewhere that you can also use the FBH remote to cool the car rather than just heat in the winter

Am I imagining this  ** 2007 FF RR Vogue SE TDV8 in Zermatt Silver **

Yes, you are correct. When the temperature is above 15 C it will start to circulate external air. This works on my MY 2010. Range Rover TdV8 Autobiography MY2010
Defender 110stw Td5 MY2006

Yep, works too on my FFRR MY05 Vogue, the light on the remote turns green instead of red.

Thanks all, I shall give it ago during the upcoming Bristol heatwave  ** 2007 FF RR Vogue SE TDV8 in Zermatt Silver **