If you look at teh front page of the fit finder on the menu type but on the right it says it doesn't include the 2 isofix seats in teh fit finder. There is a link which sends you to the table I linked...not sure what teh 'vehicle specific' columns actually mean tho - but seems to indicate it will fit if I have interpretted it right...
It talks about top tether which iis available as an extra. I would get this as I have heard that the lack of any tethering at the top is what lets many isofix seats down. Indeed Which say it is safer with the tether. Here is the full report fr it (which I don't think was linked earlier...
The Duo Plus is designed for children from around a year old to about four (9 to18kg). It can be used in Isofix mode, with two- or three-point (using top tether) mounting, or a three-point adult seat belt to secure it.
It is well made and easy to use with clear instructions. Padding is excellent and leg and head support is good.
As a two- or three-point Isofix seat, its crash performance is good, with loads in front and side crashes low. Best performance is with the top tether attached (i.e. three-point). As an Isofix seat, its all round performance is good enough for it to earn the Best Buy recommendation. Using belts however, the front crash loads in particular are higher than for the Isofix and it doesn?t make the Best Buy grade.
Pros: Excellent crash performance as an Isofix seat. Good all round ease of use.
Cons: Doesn?t make the Best Buy grade as a belted seat. Seat cover must be hand-washed.
Britax Duo Plus Isofix
Price (£) 169
Total score (%) 70 Best Buy
Availability Widely available online and at independent high-street retailers
Features
Specification
Weight groups 9-18kg
Seat categories 1
Weight (kg) 8
Integral harness Yes
Part of a travel system No
Converts to a booster No
Ratings
Comfort
Comfort Good
Performance
Front crash Acceptable
Side crash Good
Overall safety Good
Fitting and using
Fitting in car Good
Belt routing Not rated
Buckling up Excellent
Daily use Good
Instructions Excellent
Correct use Good
Additional Notes
Tested with Isofix system, which doesn't use seat belts