Welcome to the forum. As Thunderbird posted, the best thing is to contact the secretaries of the UK Basenji clubs who usually have details of expected litters. This forum is ideal for gaining information about Basenjis, their characteristics and you'll be able see if a Basenji is for you.
I always recommend seeing Basenjis in their home environment if you can find somebody to let you visit. I and my Basenjis are usually available for visits but we are quite a long way from you and my youngest are now 8+years old.