It's by LS Lowry. I saw an art magazine on the kitchen table and it had a Lowry painting on the cover (must be an exhibition coming on soon) so I thought 'hey'. I just binged "lowry" and picked the best image so I don't know the name of the painting.
Here's something though: right-click the image, select properties, copy the image URL. Go to google images, click on the camera in the search bar. Now you are searching by the image itself instead of by keywords. Paste the URL and search
Which brings me here:
http://www.artgallerycumbria.com/cumbria-lowry.html
The painting is titled "Britain at Play".
Same search offers up Wikipedia, which says this: "1943 Britain at Play — busy urban scene depicting St Michael's Flags and Angel Meadow Park, Manchester"
The internet is pretty great, isn't it? Imagine trying to find all that in
books, ugh
I also doubt you have the original. He paints on quite large canvasses. In person, you can really see the detail in the little figures. Just look at the detail on the crowds in the mid-ground, you need a large canvas to do that.