I went on to their site and it states clearly what they think about trans issues:
sdp.org.uk/policies/transgender-and-biological-sex-based-rights/
POLICY PLEDGES:
Transgender individuals wishing to change their legal sex should be allowed to do so. However, we support the continued necessity for medical gatekeeping in any legal change of sex marker. We oppose proposals that would allow someone to change their legal sex by self-identification only.
We support segregation by biological sex in sport. Fair competition is not secured if male-bodied transgender athletes are permitted to compete in women’s sport and, in the case of contact sports, the risk of injury can increase significantly.
We support segregation by biological sex in prisons and women’s refuges in order to safeguard the safety and privacy of natal females. Separate prisons or prison accommodation should be provided for transgender citizens to ensure their safety and privacy.
Healthcare spending and resources for gender dysphoric individuals, including long-term psychological intervention, should be provided at sufficient levels. Physical or drug-based medical treatments for gender dysphoria should be prohibited for anyone under 18 years of age.
We support the retention of biological sex and gender identity as distinct categories in public sector data gathering such as crime statistics, poverty metrics or public health research.
We support the use of plain English for discussions of biological sex in health and reproductive care.
Honestly isn't this just want the majority of us "bigoted terfs" want? They may have found a new supporter in me.