Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

VIRGIN ATLANTIC · FLIGHT VS 12 TAXIING (LEFT THE GATE 11:18 PM ET) · SCHEDULED TIME UNKNOWN
Today

VS 12 · BOS → LHR

left the gate 11:18 PM ET · taxiing (scheduled time unknown)
Your aircraft is GVLUV (A333), coming in as VS 11 from LHR: landed 8:42 PM ET.
Forecast issued Tue 10:00 PM ET · 1h before departure

Odds over time

Arrive at LHR more than 15 minutes late?
10% chance · ±0 pts – · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
LIVE IN THE AIR 0% 5% 10% 15% 20% 3h Now Departs Lands