Baby born in Canada, father uk citizen

Hi there,

I've tried reading through the uk border agency material, but I still am not 100% sure I've found my answer.

My son was born in Canada (he's 5 months) my husband is a UK citizen with a u.k. passport (landed immigrant in Canada). I am Canadian. My husband left the England with his parents when he was very young, both of his parents are u.k. citizens (now living in Canada)

Is my baby eligible for u.k. citizenship and a u.k. passport?