1/6 diversions that I found:
UA123 (LHR-IAD) to BGR (also 3 hours late out of LHR)
UA63 (MAD-EWR) to BGR (departed 45 mins late from MAD)
UA65 (LIS-EWR) to YQX (departed 2hr 20 mins late from LIS)
As mentioned above UA55 is also headed to BGR and left CDG around 50 mins late