Don't know if this is the best place for this but..
Just had a bit of a nightmare getting a car seat for my 17mo. The cover got ripped and so was looking for a new one when I found out that the seat I was using (Maxi cosi priori from DD1) had expired - didn't realise they had such short 'sell by dates'...
Worse it had 'buckle crunch' -wasn't originally fitted into my current car (Ford Escort)...
The bit you plug the belt into was fixed to a length of belt...common on Fords apparently...so I could only get two seats that would fit -one I had heard bad things about and the other was one of the most expensive and heaviest available... until the Halford's assistant mentioned getting them shortened...brilliant! problem solved - my local MOT garage sorted them out for £20 -although they did say it could cost up to £70 -if they had to start making holes in the body work. Apparently it is safe and I could then choose more or less any seat- Great!
I now have a new MaxiCosi Priori SPS. I could have spent £70 having the seatbelts sorted and still have spent less than buying the expensive seat (which I didn't really like).
Also found out that in certain parts of the UK you can have your seat checked by the Police for free and they give impartial advice (handy -if you want to get a cheaper seat etc) - also I personally wasn't at all impressed with Mothercare - but liked Halfords..could rant how someone in Mothercare told me the seat I was using wasn't fitted correctly -after it had been checked by the police...then she admitted she had just got confused!)
Hope someone finds this useful to know ..wish I'd know it about 3 months ago...