One possibility is the car has run flats and the tyre has no air left in it, the speed needs to be kept low and the hazards are a way of advising people to be wary. If this was the case then it seems quite sensible to me.
I agree Shamus, ordinarily I would have over taken it. Trouble was, somebody at the hire company left the oil cap off my brand new car with oil being blown over the engine so I didn't want to kick it down (it's an auto) for such a short distance to the exit. I was on my way back to drop it off. There was a fair distance to begin with and I slowed down to match but he kept going slower and slower until we got down to 40 and I was getting closet to him. I didn't get angry with him but he didn't know my reason for not overtaking and I didn't know his for progressively slowing down.
Fogging again - R15 RCR
Sick of getting fog light blinded by this idiot. Some more info - Outside Clopton Farm on the B1042 heading west between Tadlow and Croydon, South Cambs - 08.40am
Absolute twat. Swerving all 3 lanes of the m25, then pulled of at reigate. When I confronted him about his appalling driving. He tried to sell me the camel he had on the back seat! The when I told him he should be riding the camel and not driving a car! He tried to trade me the two goats in his boot for my beloved wife
Can't be bothered to tax it either