Help. Can anyone let me know if they have successfully solved today's puzzle?

I seemed to have solved the B, C and D parts of the problems OK (I dubbed my 3 solutions into the Pappocom software & it confirmed they were valid). However trying to complete the central Sudoku, with the 3 corner 3x3 blocks from my completed B,C & D parts, it is inconsistent.

Without giving too much away (otherwise of course this posting would be censored!) the solutions I have so far are that B & D are the same digit & C is 2 different.

Can the constituent Sudoku parts have more than one answer (maybe I have made a mistake in solving one of the parts of the puzzle & accidentally come across a valid partial solution)?