I was - and still am - a member of https://www.prospect.org.uk/
It may be more appropriate for you to join a union which is recognised in your workplace. You can find one at https://www.tuc.org.uk/join-union
It may be more appropriate for you to join a union which is recognised in your workplace. You can find one at https://www.tuc.org.uk/join-union
Recongnition is where a union has a formal agreement to negotiate collectively either by mutual agreement or via the legal process (similar to the us system)
However unions will still represent members individually I have done so in the past.
The union that has the majority of technology workers who are union members is Prospect - this is tech in the widest sense.