Actually, I live in England, but am from Belfast, and still know that area
I would echo Gerry Rice's comment and, if at all possible, avoid NI in
July - or, at least, in the period around the 12th. It is not that the
country ceases to be beautiful or friendly during that time, but just that
opinions and viewpoints tend to become a little more polarised at that time,
and so it could be that you may not experience the same freedom of research,
or openness in asking questions as at other times of the year. I tend to go
there in late July/August, and have been able to really enjoy the
countryside and a wide variety of people and places at that time. Last
summer, I had the most wonderful time exploring my own country! - going to a
vast range of interesting places, and everywhere I went, people were willing
to stop and talk about the place we were in - it was lovely. I have also
found that in the summer, it rains a little less than at other times - last
time i visited, it only rained twice! - the first time, from Monday to
Thursday, and the second time from Friday to Sunday.
good luck, and enjoy it!