According to who - the only person who has actually claimed to have read everything the three wrote is this man
http://en.wikipedia.org/wiki/Robert_Faurisson
However Churchill wrote this on 24th July 1944
'There is no doubt this is the most horrible crime ever committed in the whole history of the world, and it has been done by scientific machinery by nominally civilised men in the name of a great State and one of the leading races of Europe. It is quite clear that all concerned in this crime who may fall into our hands, including the people who only obeyed orders by carrying out the butcheries, should be put to death after their association with the murders has been proved.'
Then on April 18 1945 in the House Of Commons, Churchill announced the following
'The matter is of urgency, as of course, it is not possible to arrest the processes of decay in many cases. In view of this urgency, I have come to the conclusion that eight members of this House and two members of the House of Lords should form a Parliamentary Delegation and should travel out at once to the Supreme Headquarters, where General Eisenhower will make all necessary arrangements for their inspection of the scenes, whether in American or British sectors.'