The only place i've seen a Hen Harrier is at an RSPB reserve near where I live that my daughter enjoys going too. I don't know an awful lot about birds of prey but I do try and find out what they are when I see them.
I agree, nothing much for any bird in Portsmouth, except maybe the pigeons although as you say to the east there is plenty. Witterings seem to be a good spot for them in general.
A few years ago Buzzards were a rare sight in these parts but they seem to be two a penny now, I couldn't believe the amount in the west country. My mother and her partner are converting a barn d