Well the which car seat guide arrived on my front door mat this morning...
this is what it says for all who may want to know...
(they didnt review that many seats, like they normally do, concentrating MAINLY on the new ones that have recentlybeen released)
Birth - 13kg group 0 / 0+
RECOMMEND
Maxi cosi cabriofix (with easy fit base) 75/100
Britax Cosi Tot Isofix 74/100
Britax Cosy Tot Premium 71 / 100
did ok
Recaro Young Profi plus 69/100
Bebe car easybob maxi SP 68 / 100
Britax Rock a tot plus 65 / 100
Mamas and Papas Primp Viaggo 63 / 100
Fisher PRICE Safe voyage infant carrier 55 / 100
AVOID
Jane Matrix 10 / 100 (
(i have ALWAYS personally hated this seat
)
9kg - 18kg
RECOMMEND
Maxi-cosi Priorifix 74/100
Maxi-cosi Tobi 70/100
Britax Duo plus isofix 70/100
did ok
Bebe Confort iseoe safe side isofix 68 /100
Britax Evolva 123 ultra 58/100
Silver cross Explorer 56 /100
AVOID :
Mamas&Papas Alto 25 / 100
Mamas&Papas Revo 10 / 100 
15kg +
RECOMMEND
Concord Lift Evo PT 74 / 100
Concord Lift Protect 72 / 100
Maxi Cosi Rodi 71 / 100
Britax Evolva 2-3 Ultra
Did ok
Cybex Solution Plus 70 / 100
Chicco Key 2 -3 58 / 100
Jane Indy Plus Team (Isofix) 48 / 100 **
Bebe Car Mutibob SP 47 / 100
* commnet about Jane Indy plus in the text... Jane Indy plus uses an isofix base, which is unusual for a group 2 / 3 seat. However, our test show that, because it has no 3rd support its isofix base offers* no safetly advantages over non-isofix seats in this group
_
From last year where different seats were tested:
The mothercare seat that vost about £40 did VERY well for 0 - 13 kg
Maxi cosi Priori scored highly for 9 - 18kg
and in a previosue report to that the Britax Renaisance scored almost as well also
15kg+: Britax Highliner and Britax Kid have scored well
SEATS TO AVOID:
The Graco seat with a back and booster, (from 15kg)(whatever its called)
Britax Cruiser plus (9kg+)
Britax Ranger (9kg+)
- other that at the moment i cant remember
Hope this is helpful!