Sure - from the Stonewall glossary here:
"Trans: An umbrella term to describe people whose gender is not the same as, or does not sit comfortably with, the sex they were assigned at birth. Trans people may describe themselves using one or more of a wide variety of terms, including (but not limited to) transgender, transsexual, gender-queer (GQ), gender-fluid, non-binary, gender-variant, crossdresser, genderless, agender, nongender, third gender, bi-gender, trans man, trans woman, trans masculine, trans feminine and neutrois."
For what it's worth I agree with you that drag and cross-dressing are different to being trans (and I don't have a problem with any of these individually). But I just think the waters are being muddied in a dangerous way.
I think some organisations, some schools, some parents, are giving children the impression that if you are gender non-conforming then you might actually be the opposite sex. For instance Stonewall recently tweeted this Metro article. I appreciate this doesn't all relate to drag queen story time! But the whole issue currently makes me nervous.