Not a butterfly I have seen much of in the North East of England. According to the web site UK Butterflies; "In England this butterfly is found south of a line between Westmorland in the west and South-east Yorkshire in the east, with a few scattered colonies further north." We are a lot further north than South-east Yorkshire and in an urban rather than woodland setting, so lucky to have this visitor to our garden.
By the way, this photo was just taken on my mobile phone. How lucky we are to have this technology today. When I was a kid, (1) I wouldn't have had a camera handy and so the moment would have been lost and (2) even if I had a camera I probably wouldn't have been able to afford to have the film developed most of the time, and so only ever used a camera sparingly.