thanks for the info alex, I have found a few more pics of congers and one of the scene of the explosion (although it doesn't show the avre's that were wrecked or any other vehicles to prove this actually was the ijzendijke blast).
it's hard to imagine the forces needed to destroy a tank by blast alone. I have been on many ranges and seen many tanks still in one piece after years of direct shelling, so to destroy a tank by just being close by shows the force that was unleashed !
alex I would love to tow the carrier behind the avre but I just don't know if I will ever be able to restore it to running condition. I suppose I could fit the tracks and pull it behind the Cromwell.