I have a 2001 Focus and it doesn't have Isofix so we use the seat with the seatbelt. I think the easyfix base fits but we never tried it. I'm sure I've read that Isofix can be fitted to older cars but we might be changing ours so we're not going to bother. Worth looking into if you're keeping it though. The seatbelts are major faff (although worthwhile, obviously!)
i use one in my focus with just a seatbelt and don't even notice the time it takes to do it up any more. It takes a few seconds and really isn't an issue. The focus does have short seatbelts, we tried a couple of other seats which didn't fit. The cabriofix is fab though.
Thanks ladies. I'd only just got my head around the world of buggies and car seats and then discovered a whole new isofix/easyfix vocabulary to get my head around. So it sounds like we can order the car seat, figure out how to fit it with seatbelts and then look into the Easyfix base if we think it'll be easier long term.