If so it’s the second one for Calderdale. This was on a mossy, unfertilised lawn on acid sandy soil in the Saville Park area of Halifax.
I have the specimen. All these pictures are of the one today.

The other I found at Wade Wood Fields on 8th October 1995 on a foray with Roy Watling, Alan Braddock, Bob Taylor and others (a joint Halifax Scientific Society and Mid-Yorkshire Fungus Group Foray.)  Said to be a new record for V.C. 63 at the time by Michael Sykes.

Same mushroom below in its blackened state on 30.10.13
confirming H.conica