TurtleAnn: No need to thank me, no but seriously this is of high importance and parents needs to know this.
First of all you should really check out this RFing gallery, here you can see with your own eyes how children can sit RFing in a car.
Way to many children are mistakenly turned around because of leg room, parents turn their child because it looks uncomfortable even though the child has never once complained. Children are very soft and we cannot compare adults opinions of what is uncomfortable with a child's. They are not small adults, there skeleton. Many people turn their little one RF again once they figure out this and the child doesn't complain at all. The child often sits in a frog position without problems I have my 5 year old RF in VW Golf so I have experience with this myself.
In 2008 the European consumer organization, ANEC, released a disturbing report based on findings in real death accidents in Sweden, USA and UK. Here are the findings they did in the UK:
5.1 Forward Facing child seats
....In six of the eight accidents the research team judged that the child would have survived had they been seated in a suitable rearward facing car seat. The ages of these children ranged from five and three-quarter months to just under four years old. In the remaining two cases the protection offered by a rearward facing seat would have been compromised by additional loading from luggage in the boot area and gross roof intrusion into the seating position. The children in these accidents were aged seven months and one and a half years old.
The organizations conclusion was that the gap between legislation and recommendations are to wide and they recommend that children should stay rear-facing up till four years across all of Europe.
For information on RFing car seats in the UK check out this page about RFing and where to buy safe car-seats.
An RFing car seat with isofix isn't any different from a forward facing car seats except for the fact that they have the tethers in the front of the seat