On one of the Sky Channels (Pick TV) Cash Cab is shown pretty much daily all year round. However, there are two versions of the show and they do not tell them apart in the Listings. It simply says "Cash Cab" so if you are watching it (or recording it as it is on at 5.00am) you have no idea what you are going to get.
Although I do like the British version of the show, I know some people do not. However, the American version is much much better and purely for the fact that the questions are great! They are so well written and put together it makes this feel like an entirely different show despite it being exactly the same in all other aspects. SO if the UK version has put you off, try and catch the US version which seems to be running now on the channel.