My car (2008 SE) seems to have developed really poor FM radio reception. A search on here has said the antenna is connected to the rear window demister, is that correct? Anyway, I took the cover off behind the upper stop light and saw a few press stud type connectors leading from the circuit imprinted in the rear glass but nothing was connected to them. Is something supposed to be connected to them? If not, how is the radio connected to the antenna?

Not quite. The FM antenna is printed onto the off-side (driver's side in UK and OZ) rear side window (with the near-side window having the DAB antenna, where fitted). There's an antenna amplifier mounted centrally just above the window.

On your MY the arial is the rear demister and there should be two amplifiers in the tailgate that the press stud wires should be connected to. MY15
Tyre Pressure Monitoring System (TPMS)
Surround Camera System
InControl Apps soon to be replaced with CarPlay (WIP)
Meridian Premium Surround Sound
Digital Audio Broadcast
Timed Climate
Cruise ECO Data
Follow Me Home Reverse
Extra Features Menu
Picture In Motion
4x4i screen (WIP)
Digital Broadcast TV
Meridian Rear Media with WIFI
Factory Powered Tailgate
Blind Spot Monitoring (BSM)
Reverse Cross Traffic Alert (RCTA)
Electrochromatic Wing Mirrors (WIP)

Thanks for the replies. I wonder where the wires have gone? You'd think they would be somewhere inside the frame near the top tail light?
I was wondering if they came off when they fixed a globe on the top tail light last service....