I'm pleased (?) to announce that I'm #3 search result for "my ex comes from jamaica he is now in uk prison for a crime he got 3 yrs we have 2 children here in the uk can he be deported when he served his time? what human rights might he have to stay in the uk?"
Don't worry, love. First, he'll be out in less than 18 months - more like a year max. Then his 'right to family life' will trump the right of the law-abiding Brit to safety from a foreign criminal. There's no doubt about it, finding a baby-mama is a sensible strategy for anyone coming here who fancies a life of crime.
(I suppose, being an ex, she might just be hoping he'll be deported. No chance.)