Flight Radar 24 showed the following 40 minutes ago "Squawk 7700 (general emergency). G-VSXY (Virgin Atlantic A333)" which looked like it was heading back to LGW
EDIT: Add a little more info
Virgin Atlantic Flight VS27, Callsign VIR27X, make a rapid return to Gatwick.
The aircraft had passed south of the Isle of Wight after departing Gatwick for Orlando, Florida when she issued a general emergency 7700 squawk.
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