Ok, so driving home the other night on the dual carriageway , the car suddenly felt like it dropped a cylinder and was running on 3. I threw it into neutral and coasted to a safe stop about half a mile away on the slipway.

Turned it off, popped the bonnet, there was a little smoke burning off the exhaust, but was minimal, checked the oil level, it was full. Signs of historic oil leaking around back of the engine bay. I didn't have my tool kit, so couldn't do much else but check levels. Gave it a few minutes, turned it over and it ran fine. Decided to drive it the rest of the way home as all seemed well and I guessed it was just having a moment.

It did the same thing another couple of times in the next 10 miles home, and the last time I lost all drive/throttle response at the bottom of a big hill which just happened to be a signal blackspot too. Tried flagging help down, no joy, so after about an hour, I tried it again, it started and it had enough to get me to the top of the hill and I coasted the 3 or 4 miles downhill from there (gotta love the moors). Decided to have a look yesterday, there was oil leaking down the hole where the spark plugs go - so have ordered a new rocker gasket. Also serviced it as the oil was pretty grim.

Since then, it will start but again, there is NO throttle response what so ever (I'm assuming it's an electronic throttle and not cable driven). Is there a way to read fault codes on these like you can with early vauxhalls (paperclip in diog pug)? Any thoughts, suggestions appreciated.