OK, I've looked at your profile and here's my input. Don't expect to like it, lol!
If I was in Ireland and within your height range, I'd be put off by your repeated preference for - or as you put it "must be" a "bottom heavy BBW". To most it implies you are only interested in the physical stuff.
Nothing wrong with preferences but if a big rear is top of your requirements it makes you seem somewhat shallow. There's more to a woman than the size of her behind - we're people, not objects just here to satisfy your fetishes.