Just a bit of an update.
Can't remember whether I told you about the tyres, but I had 5 Bridgestone Weather Control A005 fitted and they have been great.
Sadly, the alternator failed the other day. We took it to the garage ASAP, but on the way, the battery started running down, causing all sorts of dash lights to come on randomly. Acceleration was really sluggish and it threatened to stall a couple of times.
The garage replaced the alternator, belt and battery. We have just got the car back and No 1. son says it was losing power and stalling.
I have not been out in it, but started it on the drive and idle speed drops frequently from around 800 to 400-500.
Having done a quick search, Google suggests that if the battery runs right down, the ECU needs to reboot and until this happens, the engine may still be lumpy.
Does this sound right?