Raak - Transcends mere you and me.[Rosie} I find now that I cannot remember how I've heard it when "this train will terminate at Witham, from where a rail replacement bus etc.". OTH, "rittum" ...
Bismarck - [Witham] If it's the one in Essex, I used to work there and it was "Wittum" at that time. [Rhymes] the original glowworm was abcb, and we did do an aabb not long ago. It's doggerel, it probably doesn't matter much. The A12 up from Chelmsford
Projoy - (Being from that part of the world, it is indeed Witt'm. I assumed Raak knew this and so decided to push the "misunderstanding the pronunciation from the spelling" joke a centimetre further.)