Just to update anyone who's still interested...
I finally had a chat with the police officer who has charge of this "incident". She filled me in on what the police think happened. (I was knocked out and have no memory of any of this).
It appears that I was waiting at a side turn to turn right onto the main A64, having just left work. There was no traffic coming from my left, but there was a stream of traffic moving at about 30 mph coming from my right.
(I should add that traffic normally moves along this road at anything from 50 - 70 mph. It can be extremely difficult to cross, because you have wait for clear space in the traffic in both directions).
A car approached from my right in the stream with its left-hand indicator on. It appeared to slow down on approaching the junction. It looks like I interpreted this as showing that this car was going to turn left into the road I was waiting to exit, giving me an opportunity to cross, and so I moved out into the main road to begin crossing to the other lane.
The driver of the car was not turning left, however, and so hit me side-on as I crossed. I came down onto the bonnet and windscreen of the car, then slid off onto the road when the car stopped, and took no further active part in the festivities except to brighten the place up with liberal quantities of blood.
The police have two witnesses, the driver of the car behind the one that hit me, and the driver of a car who was waiting behind me at the junction, both of whom say that the car that hit me appeared to slow, and was indicating. Moreover, the driver following the car that hit me reports that the indicator had been flashing for some miles.
I of course did not know this, since I couldn't see the car's indicators until the car in front of it was clear.
So much for the cause of the accident. The police say they have referred the matter to the CPS, but they think it highly unlikely that any further action will result.
After considerable thought, and after chatting to the 75-year old driver concerned, I decided to approach the CTC's solicitors. They've taken details, and have just come back to me.
It appears that in these circumstances, fault is usually split 25% to the erroneously indicating person, and 75% to the person waiting to join the main road. In other words, I am 75% to blame for the collision. This is because traffic on the main road has right of way, signals notwithstanding.
Furthermore, because I have made a full recovery in 2 months, the claim might be worth about £1200, of which (if the driver did not countersue), I would get 25% - £300. Of course, the driver, or her insurer, might countersue, and hold my insurer (CTC) liable for 75% of her losses - probably rather more than £300.
I don't feel it's worth pursuing under these circumstances - although it does seem rather hard. I know and fear this junction - I use it every day - and I cycle a lot. I think I know what I'm doing. Cyclists are killed with depressing regularity on this road and I'm aware of this every time I use the junction. I must have been entirely convinced at the time that the car was going to turn.
Moral: never believe a signal, even if you think it's backed up by road positioning or "body language".
Mind you, I have fully recovered, and that's worth infinite amounts of money!