Yes, really. Look at their response:
Hi,Thankyou for your email.We would not be able to take any further action if this is regarding the driver taking a photo whilst driving - it is down to the driver to be responsible whilst in their vehicle and ensure they are driving safetly. If a driver is witnessed doing this by an officer at the time then they will be stopped and potentially fined.Many Thanks
So there you have it. Motons - is there no copper there present? Go for it, its down to you to be responsible and the Police couldn't give a wet slap.
Devon and Cornwall police, you're a disgrace to your uniforms.