Windy at Chicago, a few light bumps on climb, lightly bumpy at first, turning light to moderate just east of Toronto, for about 45 minutes, smoothing out. Looks like you're just north of Erin. Smooths out over Maine, good ride until about an hour east of Canada, then occasional light to moderate for the remainder of the ocean crossing. It's indicated for 36,000 and below, so you can easily climb above that, but still might be a few bumps.
Bumps let up just short of LHR, then a lightly bumpy descent and landing into LHR.