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If you compare the red, subterminal line, you'll see it's smooth in Red and Yellow-line Quakers and jagged/broken in Brick.
They still gave me a bit of bother, I just photographed an example which took me a few looks but I think its a Red-line Quaker. To be honest I dont think I got any Bricks last night. The line on this isnt perfectly smooth but I dont think its bumpy enough for a Brick- overall colouration suggest Red-line Quaker also??????
Lat/Lng: 55.1226, -6.0788
OS grid ref: NW400885