TomHardy1975 if you dont need the CEC you can disable it in the config... that might prevent your tv remote from turning on your RP
use a computer to edit the config.txt file or if you have ssh set up on your RP you can use the below to mount and edit the file. try that and see if it solves your issue.
mount -o remount,rw /flash
NOTE: in vi to edit you use the "i" key then you can edit then use "esc" to exit edit mode and then ":wq" to save and exit. or use the text editor you are used to using.
# Force HDMI even if unplugged or powered off
# Doesn't sent initial active source message.
# Avoids bringing CEC (enabled TV) out of standby and channel switch when