how can i take off the cap of a virquin jollyfill inlet valve?

tried everything to take the cap off virquin jollyfill inlet valve without success. The company said it was only necessary to lift it off.
tommo, January 2017


done
I couldnt get it off so had to use a different strategy. My good old hacksaw did the trick. The top is only a cover and is not necessary

Tommo, January 2017