I've just had the following response from RFU:
The RFU along with other nations including Australia, New Zealand, Canada and the USA has not chosen to adopt the World Rugby Transgender Guidelines at this time and will keep its current policy in place for now.
The current policy follows World Rugby’s former transgender guidelines where athletes must apply to the RFU for permission to play. For transgender females this includes providing evidence of testosterone levels below 5 nmol/L continuously for a period of at least 12 months immediately prior to application and they must keep their serum testosterone concentration below that level for as long as they wish to play in the female category. All requests are reviewed by a panel including the RFU Head of Regulation & Integrity, RFU Player Welfare Manager and a medical representative appointed by the RFU. It is important to note that we have fewer than ten transgender women currently playing in England and there has been no associated increase in injury.
The ban proposed by World Rugby would mean excluding those people immediately without any ability for them to appeal or for their particular circumstances to be considered individually.
The RFU welcomes the work undertaken by World Rugby however it believes the evidence is not advanced enough for us to be content that a blanket ban could not be challenged.
The RFU wants to keep the welfare of all players at the heart of its decision making. At the same time, rugby has always been an inclusive sport and so when considering this complex subject, we believe we also need to make sure we are taking an approach which supports inclusivity while protecting fairness and safety for female players.
The World Rugby Transgender Guidelines have created many sensational headlines and while this is a complex subject that invokes many strong views, it is important to highlight that the RFU response is carefully considered.
As a next step the RFU will work with other Unions to continue to develop scientific work, to answer outstanding questions so that we can develop guidelines that can be implemented globally. Our aim is to work with World Rugby to find a solution that is as inclusive as it can be, whilst achieving fairness and safety for women. The RFU will also undertake further consultation with players in the women’s game to understand their views.