Just found a cheap way to stream your music via Bluetooth. A Bluetooth music receiver plugs into the jack in the car then just connect via Bluetooth on your phone and away you go. Cost Under £10 from Amazon. For that sort of money thought it was worth a pop, result works great.
It’s an MPOW streambot mini model MPBH044AB if anyone’s interested  2008 G4 RRSport TDV8 current
2009 TDCi 90 current
2018 Discovery 5 HSE lux current
1994 Dakar current

Also This for £1.69 inc postage from China!

Only difference is that you'll need a USB socket, so a cigar socket/USB charger required as well. But as there is charger socket in the rear by the Aux...

I purchased one for my XC70 - works perfectly