Jamaicans slangs in Great Britain

How can I forget the mother country? The one from which we gained our independence. Just typing the name I picture Queen Elizabeth and Charles, and I can almost hear their British accent echoing in my ear.

I know that Jamaicans are very much present there. I remember as a child there was a program that allows Brits to send greeting to their family back home.

I contacted my friend in Canada and the feedback was not good.

Is the Jamaican population creating havoc there in Great Britain as well; or is there a good report?