For those interested in the Jane Slalom Pro Here is my review, after basically ten minutes of ownership!
It's big, nice big not stupid big. Nice and high off the ground for baby to travel in I think. VERY light to push and maneuver, 3 wheeler with front swivel wheel makes it very easy. Single bar handle means you can steer and push it with one hand. Front wheel locks into place if you want it to. Pushchair section reclines easily and had movable foot rest so semi-reclined with foot rest up I think it would be very snug for a 1 year old and then you just adjust as they grow up to 4 years. It's a big of a faff to take the pushchair section off - lots of poppers and zips - but all the fabric comes off and can be machine washed (mine is second hand and has had two babies in and it is very clean!) Plus you don't need to take the pushchair part off to fold it. Anyway I won't be using that for the first 9mo/1yr as I also have the Matrix Cup Car Seat, which is BIG, goes across two seats and doubles as a carry cot and overnight bed (if you buy the mattress - about £15 new) This is lie flat, but can be adjusted to sit up a little and then becomes a rear facing car seat when in the up postion. As it means the baby can lie totally flat it is suitable from birth up to 13kg (9/12 months) and there are no time restrictions for how long baby can stay in it (max 2 hours in a normal car seat due to curled position and possible risk of not getting enough oxygen) Can go on the pram facing forwards or backwards, flat or up. Unzips down both sides so baby can be put in and whole snug thing can be zipped off if it's warm. Has a hood which goes all the way down and can be taken off. It's not light, but easy enough to get out of the car and onto the pram frame with one hand and it clicks into the frame in one move. Frame when folded is not small, but I don't have a lot of pram knowledge to compare it with, it fits easily with room to spare in the boot of my estate car and would fit in most hatchbacks I imagine, just a little more snugly. Wheels come off easily, you just press the button in the middle and they pop off, so that would make it smaller in a car and easier to change a tyre. A spare set of wheels on ebay is about £5-£15 and we are going to buy a set just in case of punctures or damage as I will do a lot of off roading with it! There is a pump with the pram and if that has been lost a bicycle pump fits fine.
Wow that's long! Hope it's useful, I find there isn't a huge amount of information about these prams on the internet all in one place and I they are not common, but I really love it 
with raincovers and the matrix etc. There are quite a few on ebay for very reasonable prices (I think because they're not a common name like mamas and papas or quinny etc?) and most can be posted for about £40 courier.
nb. also handle is adjustable and suitable for up to 6'4 which may be handy for those of you with taller DPs etc.
Here it is in mothercare - the slightly newer version of the model than mine and it's 20% off!!
www.mothercare.com/Jane-Slalom-Pro-Matrix-Light-2-Pushchair/LU4483,default,pd.html