These are the top 10 LGBT-inclusive employers in the UK:
https://www.cnbc.com/2019/01/21/lgbt-inclusive-employers-in-the-uk-stonewall-report.html
The article states:
The leading Trans-inclusive employers in the UK: (Unranked list, it is in alphabetical order)
Baker McKenzie
Bryan Cave Leighton Paisner
Cardiff University
Citi
Manchester Metropolitan University
National Assembly for Wales
Newcastle City Council
Pinsent Masons
Skills Development Scotland
St Mungo's
Swansea University
The University of Sheffield
Victim Support
Welsh Government.