Rob, I have seen the taxi's but as I said I have done any really late nights out here yet, I've been out in the evening but not after 1am (I think that counts as night and not evening

) I wasn't sure if they all knocked off for the night at a certain time.
My experience in and around London at very late hours is that hailable cabs are either sparse (so its better to have ordered a mini cab in advance) or sometimes refuse to take groups of drunk people (we're very well behaved but they don't know that!) prefering 2's or at most 3's.
Also having never been in a cab in basel I had no idea of the cost, I feared it would be extremely expensive and as I have UK people over I didn't want them to die of shock and would rather warn them in advance of prices.. but 25CHF actually isn't too bad!
Thanks for the info guys, its great to know there will be taxis lined up at that hour outside our destinations

Bus time table is v useful also.