Just to correct the title header. The "alleged" culprits were the Leibstandarte.
I never said that i believe those veterans...
Panzermahn, your not back peddling by any chance are you? Because you said this,
Apart from Le Paradis, the Waffen SS men never shoot any surrendering British troops in large numbers (50+) anywhere in WW2
Panzermahn, before i answer your question, read this quote from another survivor...
I struggled to my feet and a lad about nineteen with a Birmingham accent helped me. We shook hands and took our places. He was at number four, I was at number five.
The officer gave the command. "Eins"! A shot. After what seemed an eternity (in reality, about two seconds), "Zwei!" and another shot. It was surprisingly easy to show no panic. I could only stand on my good leg so movement was impossible. The situation was so hopeless that it was almost a relief to think that it would soon be over.
"Drei!" The third rifle fired and despatched its victim. I tried to concentrate my thoughts on my past life and on my family.
'Vier!" The fourth rifle fired and I saw from the corner of my eye the boy with the Birmingham accent fall. My mind was buzzing with half-remembered sights and sounds. My father practising the 'cello; the cricket nets on the middle playground at Colfe's; the smell of the fats and rags and bones in my uncle's Marine Store at Margate.
'Funf" It was just like a sharp blow from a fist in my chest that knocked me over. As I hit the ground everything left my mind except the sensation of raging thirst and the certainty that I was dead.
When I opened my eyes I saw the grass and the khaki of my battle-dress. The thought gradually came to me that I was not dead. I lay perfectly still and strained my ears. There was no sound, I raised my head from my arm and felt the pains in my chest and leg. My spectacles were close by and unbroken and that seemed more important. I put them on and looked at my watch. It was four o'clock. The massacre had taken place at noon.
Brian Fahey.
So if you believe Bert Evans is a liar, remember this is the guy with the mangled arm! You possibly can't doubt Brian Fahey can you?
http://www.jazzprofessional.com/Minstrel/MASSACRE.htm
And you seriously cannot doubt this cemetery, CAN YOU?
WORMHOUDT COMMUNAL CEMETERY, FRANCE
why didn't the British Government persecute any Germans connected to the alleged Wormhoundt atrocity
Panzermahn, Postwar Europe was turned upside down, countries were bankrupt, millions of people were displaced...The British authorities could not, or would not believe that these
two atrocities had actually taken place...The Germans had been put to the sword, but on the horizon was a fast approaching future enemy! So eyes and thoughts were elsewhere.
The Wormhoudt crime do not go away in the minds of those that suffered....So much so infact, the question was raised in parliament in the late eighties, and again in the early nineties...But alas to much time had past, memories fade, veterans die.
, while the Aryan Gods stomped around Europe demonstrating their martial prowess and then crying like ******* when they were beaten. 
(the SS) apologists really **** me off,my mother remembers the Germans coming to the farm and taking chickens ,bread etc from them,her father had to flee to the mountains because the germans were taking the men from the farms to work in Germany. I have no sympathy for any German SS veteran [additional and profane sentiments deleted by moderator - DT] . My Grandfather was with the Desert Rats in Europe he saw the camps first hand ,after the war ended he helped hunt down SS men for trial,he never mentioned it till I said I liked SS uniforms then he got very upset ,but he didnt tell me grandma did ,he didnt want to talk about it.