This Hauck Malibu Shop 'n' Drive Travel System is reduced from £359.99 to just £179.99 at Babies R Us right now.
I can't vouch for this particular travel system as I've never owned one myself, but the ease of a travel system (basically a buggy which is compatible with a car seat) is something I'm a big fan of. You can basically lift the Zero Plus Comfort 0+ car seat straight out of the car and pop it into the buggy base, without having to wake a sleeping child or grapple with two lots of straps.
The car seat can be used from birth until 13 kg, and the buggy has a lightweight aluminium frame, fixable swivel front wheels, and an adjustable backrest. There's also an adjustable footrest, a detachable canopy and a large shopping basket.
There are nine reviews of this on the Babies R Us website and here's a fairly typical one to help you decide whether this item might suit your requirements:
"I have had two Hauck travel systems and this is by far the best one. It is so easy to put up and click the carseat in. The carseat is so easy to strap in the car. Base fits lovely in my boot as it's not very big. Overall a bargain buy."
This item is also available with free delivery. Bonus!