So you're thinking about fleeing rising anti-trans legal threats

Trans Rescue reporting a 40x increase in the number of trans people seeking assistance to escape Britain following the supreme court ruling that trans women are to be treated as men for the purpose of the Equality Act. Lots of trans people from the United Kingdom who have never migrated internationally and have very poor understanding of border systems keep saying misguided things around this.
My personal advice is:
- Save some money
Don't do anything rash. Your money will be good pretty much anywhere you might want to spend it. It's a decision that you can make tomorrow what to do with it so there's no reason not to just save it so that it is there when you do.
Also, whatever your situation, if things do go very suddenly much worse, even if you don't have full documentation to be somewhere else, cash for a flight on a tourist visa to somewhere you can figure out further moves and some savings for temporary accommodation is a helpful security plan if you might need it.
- Look into your options.
Many places which looked safe a year or two ago are not looking so great now. E.g. New Zealand were a great place to be trans, and now have a National party government trying to push through rules that will make trans people less safe. Canada used to be a popular plan but obviously it's on the border with America threatening to invade. Australia is a mixed bag (don't go to Queensland) and Europe is suffering from a wave of far right expansion.
Ireland has a migration agreement with the United Kingdom for now (although this might break down if the UK pulls out of the Human Rights Act and ECHR), so that is a short term destination UK citizens might want to consider in an emergency.
Thailand and Taiwan both have great LGBT rights and don't seem to be affected by the current Anglo-European campaign for reinforcing a version of gender norms that forget the existence of trans people, and they might potentially be okay places to be if the shit hits the fan on other far right expansion in Europe. I imagine there are potentially places in Latin America that are reasonable options. Violence against trans people in Latin America is high, but trans rights reforms are rapidly winning in a large number of Latin American states.
Many countries have particular visas for particular high demand skills, so consider this when you are looking into your options.
- Get your passport (and your families' passports) in order
If you have 2-3 years left on your passport, you will want to make sure you get it updated soon so that you can have a clear decade working out where you need to land, if you can afford to renew your passport, do.
- Stop fantasising about Asylum
The Asylum system in pretty much every country is a nightmare. It is the worst possible option if you are fleeing oppression in your home country. It is normal especially for LGBT refugees to rely on economic migrant pathways because they are at least somewhat less traumatic than asylum routes and you have better chances of being able to stay than using asylum routes. Far to many White British or American trans people have a serious lack of understanding of how brutal asylum is, despite ongoing stories of trans people from literal dictatorships known for using chemical weapons on civilians being refused asylum in liberal democracies quite routinely.
- Be realistic about how bad things are and how bad they can get
Key here is not fooling yourself about the grass being greener elsewhere. Violent crime, police neglect and so on is a problem everywhere in the world for trans people. Britain has gone through a run of moral panics through its history around trans people without these being cause to flee elsewhere. Particularly notable around toilet facilities was the aftermath of the Fanny Park And Stella Boulton trial of 1870 – both were acquitted of any wrongdoing and being found not guilty despite the moral anguish of Britain about 2 crossdressers using the female toilets resulted in a massive crackdown with laws being strengthened and police raids on underground trans social events like the 1880 Hulme Fancy Dress Ball. There has never been a time in Britain's history however for the human rights situation to escalate so seriously beyond mere police harassment, commonplace abuse and moral panic that trans people need to leave en masse. The only incident in European history that has really justified mass flight of trans people was the rise of the Nazis in Germany.
Keeping your options open saves you from wasting money going somewhere that's not suitable and having to return in a few years (and having to return in a few years is a sign that you didn't need to leave in the first place!). Saving your money is a bet on getting away from an actual serious legislative or governmental threat. It's a choice you can make in the future but you don't need to make until it's necessary to do so.