Regarding the ERTMS under solebar, there’s just an ECTS doppler radar just in front of the front bogie and a balise reader just behind the front bogie (both ends of course). The rest of the equipment is the massive cupboard as shown by @craigybagel , the ERTMS screen in the cab, an isolation switch and a reset button. There’s also 1 or 2 transmitters/receivers on the roof but I can’t find the notes for the full system anywhere so I can’t confirm them.
Just a note about ERTMS, it can’t be switched off. It can only be isolated if it’s broke and preventing the train from moving. It then has to come out of service. Network rail won’t allow us to deactivate it when not running on lines not fitted with that signalling type. Which is a major pain for us drivers shunting them about at the depots. Some can take 5 minutes to boot up if they fail the first time.
Given these were designed nearly 10 years ago. If they were designed today, would they take up nearly as much room? Pretty sure the computer power needed could fit in an iPhone these days? No? (I’ve never seen inside the massive cupboard, they won’t let us near it! (Probably for the best to be fair))
Just a note about ERTMS, it can’t be switched off. It can only be isolated if it’s broke and preventing the train from moving. It then has to come out of service. Network rail won’t allow us to deactivate it when not running on lines not fitted with that signalling type. Which is a major pain for us drivers shunting them about at the depots. Some can take 5 minutes to boot up if they fail the first time.
Given these were designed nearly 10 years ago. If they were designed today, would they take up nearly as much room? Pretty sure the computer power needed could fit in an iPhone these days? No? (I’ve never seen inside the massive cupboard, they won’t let us near it! (Probably for the best to be fair))