Crown and mushroom mark!

Hi all,  
I'm an avid collector of glass, mainly British, and came across this piece in my favourite charity shop.  I think it may have originally been an ashtray, nevertheless I liked the shape so picked it up for a couple of pounds.  I like to research makers marks etc and usually come up with something but this one has me stumped.  Sorry the photo isn't great but the mark is what looks like a crown sitting on a mushroom with the letters W & Q (or Q & W) underneath. If anyone can help I'd be most grateful.  Thanks all.

Hi Shirley, please use the post reply button to add your photo's

Hi all,  
I'm an avid collector of glass, mainly British, and came across this piece in my favourite charity shop.  I think it may have originally been an ashtray, nevertheless I liked the shape so picked it up for a couple of pounds.  I like to research makers marks etc and usually come up with something but this one has me stumped.  If anyone can help I'd be most grateful.  Thanks all.

Hi, I hope you can see it now,
kind regards,
shirley

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