i don't give a shiny shit about the gender politics of this.
the government states that frequent non-attenders for cervical screening include ethnic minorities, people in lower socio-economic groups and women with learning disabilities. ((along with lesbian and bisexual women, women over 50 and younger eligible women 25-29.))
let's make this a numbers game.
if you look at the list, the people who are in danger and need to be encouraged by awareness-raising activities include three groups who it'd be reasonable to assume would have language, educational or cultural barriers that could lead them not to know what a cervix is.
CRUK is failing the people who need this information most.
it's basic nudge theory (or applied marketing) - don't make it any harder than it needs to be for people do what they need to do.
if CRUK need to do a campaign for (the albeit small number of) transmen to know that they still need to have cervical screening then by all means do that, but not at the expense of the vulnerable groups who need clear, unambiguous information that doesn't require a degree in physiology.
if transwomen get in touch to get their screening organised despite not having received a notification, that can be dealt with appropriately (and you'd hope sensitively) at that time by their GP.
gov stats here: stats and good explanation of GP guidance on transmen