I've lost a TV series possibly from the 90s, maybe about ethnic cleansing

[KatyMac]

It's very vague

2 parts of a city - people moving from one ro the other with wrist bands that exploded with dye when they stayed too long

People travelling/being smuggled (to the UK?) Writing postcards to say they arrived safely then being electrocuted before they got there

Any ideas?

There was a programme black something which I think was about people smugglers who killed the people they smuggled. Not for ethic cleanising but to get money and conceal evidence??

Dunno but sounds interesting so following for answer

They were in a cave and holding on to a wire and they electrocuted them

I remember that. Was it people being smuggled into the EU from Eastern Europe?

Yes something like that

And maybe living in ghettos/separately when/if they got here

I remember something on C4 where a woman immigrant was trying to escape from a camp near Dover and police stopped her on a hill. Does that sound like it?
I only watched a bit of it.

Maybe I though the lead was a journalist with permission to work but it got revoked when she stayed across the border too long and her bracelet released the dye