PET is the Progress Education Trust.
https://www.progress.org.uk/
They were successful in campaigning for Mitochondrial Replacement Therapy (MRT) or '3 parent embryos', where the nucleus of the egg is removed and replaced with the nucleus from the egg of another women, so to eradicate the risk of an embryo carrying a hereditary disease.
(This was made famous in its experiments with Dolly the Sheep).
I'm guessing that since that has been archieved PET are now to campaign for changes to the Human Fertilisation Act to include uterus implants in men:
The HFE Act defines women and men as respectively being a girl and a boy from birth – ie, cis people. This is problematic due to its inferred discrimination towards trans people. While legislation in the UK provides no alternate definitions of men or women, the Gender Recognition Act 2004 was designed to enable trans people to be legally recognised by their 'acquired gender' if they hold a Gender Recognition Certificate (GRC).
Thus, the wording in the HFE Act could not only be considered discriminatory but essentially means that the prohibitions do not apply to men or non-binary people (although non-binary people are currently not recognised within any legislation in the UK). This is significant because social and scientific advances mean that 'men' as defined by the HFE Act increasingly have possibilities to gestate and birth a child.
If a cis man was to receive a uterus transplant, there are no limitations in terms of what could be legally placed inside him. Additionally, if 'acquired genders' are claimed to be recognised in the HFE Act, then what can be placed inside a (trans)man who has his own uterus is also unregulated. Consultations with policy staff at the HFEA and the Department of Health and Social Care revealed that neither institution was able to clarify the implications that these gender-based prohibitions could have or how they relate to the GRCs. In this context, I decided to discuss the implications the gender-based prohibitions could have in an article in Reproductive Biomedicine Online.
Campaigning to amend the HFE Act to avoid such discrimination could feasibly be next on PET's list. Nonetheless, the mounting pressure such issues generate means that sooner or later the HFE Act will have to be amended to reflect the growing social and scientific advances, particularly those afforded by ARTs on a larger scale. I have no doubt that when the new Bill is drafted to address matters such as the gender-based prohibitions, the 14-day rule, and egg freezing, PET will be at the forefront of ensuring that nothing is overlooked.
https://www.bionews.org.uk/page_155094
(I got this from a clever and well connected woman and her comment was "I'm starting to think Orwell was lacking in imagination.")